US3407612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submarine pipeline caisson
Assignee: Individual
•
Filing: 1966-02-04
•
Granted: 1968-10-29
•
Expires: 1986-02-04
Abstract
No abstract record available.
Inventors
- 👤 Iii Wylie B Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:54
CPC Classifications
F; F16; F16L; F16L1/00; F16L1/26; B; B63; B63C; B63C11/00; B63C11/34; B63C11/36; B63C11/38; B63C11/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US962019A
Cited
US1853379A
Cited
US1894206A
Cited
US2187871A
Cited
US2812641A
Cited
US2931187A
Cited
US3111812A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |