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4. PATENTS | 9 Months Ended
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Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
4. PATENTS | 4. PATENTS Acacia’s only identifiable intangible assets at September 30, 2020 and December 31, 2019 are patents and patent rights. Patent-related accumulated amortization totaled $326,296,000 and $322,774,000 as of September 30, 2020 and December 31, 2019, respectively. Acacia’s patents have remaining estimated economic useful lives ranging from three to fifty-five months. The weighted-average remaining estimated economic useful life of Acacia’s patents is approximately four years. The following table presents the scheduled annual aggregate amortization expense as of September 30, 2020:
Schedule of intangible assets |  |  |  |
For the years ending December 31, |  |  |
(In thousands) |  |  |  |
Remainder of 2020 |  | $ | 1,158 |
2021 |  |  | 4,451 |
2022 |  |  | 4,451 |
2023 |  |  | 4,376 |
2024 |  |  | 3,005 |
Thereafter |  |  | 630 |
Patents, net |  | $ | 18,071 |

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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