Patent US3412862A successfully refreshed from Google Patents.
US3412862A
Expired / Lapsed
US
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Method and apparatus for cleaning areas overlain by a water body
Assignee: Individual
•
Filing: 1967-09-07
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Granted: 1968-11-26
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Expires: 1987-09-07
Abstract
No abstract record available.
Inventors
- 👤 Merle P Chaplin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:46
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/8858; E02F3/8875; E02B; E02B3/00; E02B3/02; E02B3/023; E02F3/90; E02F3/92; E02F3/9256; E02F3/9262; E02F3/9268; E02F3/9281; E02F5/00; E02F5/28; E02F5/287
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US729718A
Cited
US1393492A
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US1617654A
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US1748898A
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US2207988A
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US2315254A
Cited
FR1098554A
Cited
US3071249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |