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PATENTS | 12 Months Ended
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Sep. 30, 2023
PATENTS |
PATENTS | 6. PATENTS Patents consist of the following at September 30:
|  | 2023 |  |  | 2022 |
Patents |  | $ | 853,445 |  |  | $ | 893,833 |
Accumulated amortization |  |  | (655,741 | ) |  |  | (681,632 | )
Patents, net |  | $ | 197,704 |  |  | $ | 212,201 |
During the years ended September 30, 2023 and 2022, there was no impairment of patent costs. The weighted average amortization period for patents is approximately 8 years. Amortization expense for the years ended September 30, 2023 and 2022 totaled approximately $38,000 and $49,000, respectively. The total estimated future amortization is as follows:
Years ending September 30, |
2024 |  | $ | 32,000 |
2025 |  |  | 29,000 |
2026 |  |  | 25,000 |
2027 |  |  | 22,000 |
2028 |  |  | 19,000 |
Thereafter |  |  | 71,000 |
|  | $ | 198,000 |

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//350-30/tableOfContent + Details
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