diff --git a/grobid-home/models/patent-citation-BidLSTM_CRF/config.json b/grobid-home/models/patent-citation-BidLSTM_CRF/config.json
deleted file mode 100644
index 1b520716ec..0000000000
--- a/grobid-home/models/patent-citation-BidLSTM_CRF/config.json
+++ /dev/null
@@ -1,26 +0,0 @@
-{
-    "model_name": "patent-citation-BidLSTM_CRF",
-    "architecture": "BidLSTM_CRF",
-    "embeddings_name": "glove-840B",
-    "char_vocab_size": 188,
-    "case_vocab_size": 8,
-    "char_embedding_size": 25,
-    "num_char_lstm_units": 25,
-    "max_char_length": 30,
-    "features_vocabulary_size": 12,
-    "features_indices": null,
-    "features_embedding_size": 4,
-    "features_lstm_units": 4,
-    "max_sequence_length": 3000,
-    "word_embedding_size": 300,
-    "num_word_lstm_units": 100,
-    "case_embedding_size": 5,
-    "dropout": 0.5,
-    "recurrent_dropout": 0.5,
-    "use_crf": true,
-    "use_chain_crf": false,
-    "fold_number": 1,
-    "batch_size": 20,
-    "transformer_name": null,
-    "use_ELMo": false
-}
\ No newline at end of file
diff --git a/grobid-home/models/patent-citation-BidLSTM_CRF/model_weights.hdf5 b/grobid-home/models/patent-citation-BidLSTM_CRF/model_weights.hdf5
deleted file mode 100644
index 9772b0a38e..0000000000
Binary files a/grobid-home/models/patent-citation-BidLSTM_CRF/model_weights.hdf5 and /dev/null differ
diff --git a/grobid-home/models/patent-citation-BidLSTM_CRF/preprocessor.json b/grobid-home/models/patent-citation-BidLSTM_CRF/preprocessor.json
deleted file mode 100644
index 55b86b0a70..0000000000
--- a/grobid-home/models/patent-citation-BidLSTM_CRF/preprocessor.json
+++ /dev/null
@@ -1,227 +0,0 @@
-{
-    "padding": true,
-    "return_lengths": true,
-    "return_word_embeddings": true,
-    "return_casing": false,
-    "return_features": false,
-    "return_chars": true,
-    "return_bert_embeddings": false,
-    "vocab_char": {
-        "<PAD>": 0,
-        "<UNK>": 1,
-        "!": 2,
-        "\"": 3,
-        "#": 4,
-        "$": 5,
-        "%": 6,
-        "&": 7,
-        "'": 8,
-        "(": 9,
-        ")": 10,
-        "*": 11,
-        "+": 12,
-        ",": 13,
-        "-": 14,
-        ".": 15,
-        "/": 16,
-        "0": 17,
-        "1": 18,
-        "2": 19,
-        "3": 20,
-        "4": 21,
-        "5": 22,
-        "6": 23,
-        "7": 24,
-        "8": 25,
-        "9": 26,
-        ":": 27,
-        ";": 28,
-        "<": 29,
-        "=": 30,
-        ">": 31,
-        "?": 32,
-        "@": 33,
-        "A": 34,
-        "B": 35,
-        "C": 36,
-        "D": 37,
-        "E": 38,
-        "F": 39,
-        "G": 40,
-        "H": 41,
-        "I": 42,
-        "J": 43,
-        "K": 44,
-        "L": 45,
-        "M": 46,
-        "N": 47,
-        "O": 48,
-        "P": 49,
-        "Q": 50,
-        "R": 51,
-        "S": 52,
-        "T": 53,
-        "U": 54,
-        "V": 55,
-        "W": 56,
-        "X": 57,
-        "Y": 58,
-        "Z": 59,
-        "[": 60,
-        "\\": 61,
-        "]": 62,
-        "^": 63,
-        "_": 64,
-        "a": 65,
-        "b": 66,
-        "c": 67,
-        "d": 68,
-        "e": 69,
-        "f": 70,
-        "g": 71,
-        "h": 72,
-        "i": 73,
-        "j": 74,
-        "k": 75,
-        "l": 76,
-        "m": 77,
-        "n": 78,
-        "o": 79,
-        "p": 80,
-        "q": 81,
-        "r": 82,
-        "s": 83,
-        "t": 84,
-        "u": 85,
-        "v": 86,
-        "w": 87,
-        "x": 88,
-        "y": 89,
-        "z": 90,
-        "{": 91,
-        "|": 92,
-        "}": 93,
-        "~": 94,
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-        "\u00e7": 116,
-        "\u00e8": 117,
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-        "\u00eb": 120,
-        "\u00ec": 121,
-        "\u00ed": 122,
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-        "\u00ef": 124,
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-        "\u00f7": 128,
-        "\u00f9": 129,
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-        "\u00fc": 131,
-        "\u0153": 132,
-        "\u0192": 133,
-        "\u02dc": 134,
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-        "\u0393": 136,
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-        "\u0398": 138,
-        "\u03a3": 139,
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-        "\u03c6": 156,
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-        "\u201c": 159,
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-        "\u2022": 162,
-        "\u2032": 163,
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-        "\u223c": 175,
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-        "\u2265": 180,
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-        "\u22c0": 183,
-        "\u25a0": 184,
-        "\u25cb": 185,
-        "\u25ef": 186,
-        "\ue70d": 187
-    },
-    "vocab_tag": {
-        "<PAD>": 0,
-        "B-<refNPL>": 1,
-        "B-<refPatent>": 2,
-        "I-<refNPL>": 3,
-        "I-<refPatent>": 4,
-        "O": 5
-    },
-    "vocab_case": [
-        "<PAD>",
-        "numeric",
-        "allLower",
-        "allUpper",
-        "initialUpper",
-        "other",
-        "mainly_numeric",
-        "contains_digit"
-    ],
-    "max_char_length": 30,
-    "feature_preprocessor": null,
-    "indice_tag": {
-        "0": "<PAD>",
-        "1": "B-<refNPL>",
-        "2": "B-<refPatent>",
-        "3": "I-<refNPL>",
-        "4": "I-<refPatent>",
-        "5": "O"
-    }
-}
\ No newline at end of file