Patent US3443776A successfully refreshed from Google Patents.
US3443776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ringplane
Assignee: Individual
•
Filing: 1966-05-04
•
Granted: 1969-05-13
•
Expires: 1986-05-04
Abstract
No abstract record available.
Inventors
- 👤 Alvin E Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:01
CPC Classifications
B; B64; B64C; B64C3/00; B64C3/30; B64B; B64B1/00; B64C1/00; B64C1/34; B64B2201/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191128704A
Cited
US1667002A
Cited
US1766906A
Cited
US2382817A
Cited
US2960294A
Cited
US3106373A
Cited
GB837591A
Cited
US3229935A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |