Patent US2943874A successfully refreshed from Google Patents.
US2943874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stern tube safety ring assembly
Assignee: Individual
•
Filing: 1955-09-19
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Granted: 1960-07-05
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Expires: 1975-09-19
Abstract
No abstract record available.
Inventors
- 👤 Walter J Valdi
- 👤 Emmett T King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:23
CPC Classifications
B; B63; B63H; B63H23/00; B63H23/32; B63H23/36; Y; Y10; Y10S; Y10S277/00; Y10S277/914
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US632442A
Cited
US2038140A
Cited
US2174075A
Cited
US2257119A
Cited
US2438153A
Cited
GB647650A
Cited
GB679919A
Cited
US2648554A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |