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PATENTS | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Goodwill and Intangible Asset Impairment [Abstract] |  |
PATENTS | 7. Patents PATENTS In fiscal 2005, the Company started the patent process for additional WATER$AVR® products. Patents associated with these costs were granted in 2006 and they have been amortized over their legal life of 17 years. SCHEDULE OF PATENTS
|  | March 31, 2022 Cost |  |  | Accumulated Amortization |  |  | March 31, 2022 Net |
Patents |  | $ | 212,161 |  |  | $ | 202,572 |  |  | $ | 9,589 |
|  | December 31, 2021 Cost |  |  | Accumulated Amortization |  |  | December 31, 2021 Net |
Patents |  | $ | 208,079 |  |  | $ | 194,380 |  |  | $ | 13,699 |
The increase in the carrying amount of patents is primarily due to foreign currency translation effects. The 2022 cost in Canadian dollars - $265,102 (December 31, 2021 - $265,102 in Canadian dollars). Amount of amortization for 2022 - $4,110 (2021 - $4,110) and is included in cost of sales in the consolidated statements of income and comprehensive income. Estimated amortization expense over this year is as follows: SCHEDULE OF ESTIMATED AMORTIZATION EXPENSE
2022 |  |  | 13,699 |
| 7. Patents PATENTS SCHEDULE OF PATENTS
|  | 2021 Cost |  |  | Accumulated Amortization |  |  | 2021 Net |
Patents |  | $ | 208,079 |  |  | $ | 194,380 |  |  | $ | 13,699 |
|  | 2020 Cost |  |  | Accumulated Amortization |  |  | 2020 Net |
Patents |  | $ | 208,211 |  |  | $ | 178,074 |  |  | $ | 30,137 |
Decrease in 2021 cost was due to currency conversion. 2021 cost in Canadian dollars - $265,102 (2020 - $265,102 in Canadian dollars). Amount of amortization for 2021: $16,438 (2020 - $16,438) and is included in cost of sales in the consolidated statements of income and comprehensive income. Estimated amortization expense over the next five years is as follows: SCHEDULE OF ESTIMATED AMORTIZATION EXPENSE
2022 |  | $ | 13,699 |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -URI https://asc.fasb.org/subtopic&trid=2144471 + Details
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