Patent US3491541A successfully refreshed from Google Patents.
US3491541A
Expired / Lapsed
US
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Submarine pipe laying apparatus and method
Assignee: HOUSTON CONTRACTING CO
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Filing: 1967-03-30
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Granted: 1970-01-27
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Expires: 1987-03-30
Abstract
No abstract record available.
Inventors
- 👤 Dailey J Berard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:16
CPC Classifications
F; F16; F16L; F16L1/00; F16L1/12; F16L1/20; F16L1/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2870639A
Cited
US3247674A
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US3273346A
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US3258928A
Cited
US3331212A
Cited
US3321925A
Cited
US3280571A
Cited
US3390532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |