Patent US3534477A successfully refreshed from Google Patents.
US3534477A
Expired / Lapsed
US
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Method,system and apparatus for surveying revetments
Assignee: JACK N NAHAS
•
Filing: 1967-09-14
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Granted: 1970-10-20
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Expires: 1987-09-14
Abstract
No abstract record available.
Inventors
- 👤 Jack N Nahas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:17
CPC Classifications
E; E02; E02B; E02B3/00; E02B3/04; E02B3/12; E02B3/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US905620A
Cited
US1590020A
Cited
US2183492A
Cited
US2226060A
Cited
US2580320A
Cited
US3014450A
Cited
US3166123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |