US3465807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retractable rig for operating hatch covers
Assignee: MacGregor Comarain Inc
•
Filing: 1967-12-26
•
Granted: 1969-09-09
•
Expires: 1987-12-26
Abstract
No abstract record available.
Inventors
- 👤 Urban J Beas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:23
CPC Classifications
B; B63; B63B; B63B19/00; B63B19/12; B63B19/14; B63B19/19; B63B19/203
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US834287A
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US965367A
Cited
US2242635A
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US2556175A
Cited
US2616666A
Cited
US3022536A
Cited
US3045632A
Cited
US3109544A
Cited
US3108631A
Cited
US3389739A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-08 | 1973-03-10 | 1973-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-08 | 1977-03-10 | 1977-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-08 | 1981-03-10 | 1981-09-09 | $7700.00 | Window Closed / Lapsed |