US3505677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diving casque
Assignee: E F A ETUDES ET FABRICATION AE
•
Filing: 1967-12-21
•
Granted: 1970-04-14
•
Expires: 1987-12-21
Abstract
No abstract record available.
Inventors
- 👤 Yves Le Masson
- 👤 Marcel Pravaz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:05
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/04; B; B63; B63C; B63C11/00; B63C11/02; B63C11/04; B63C11/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2935985A
Cited
GB836925A
Cited
US2973521A
Cited
US3157885A
Cited
US3130415A
Cited
US3362403A
Cited
US3293659A
Cited
US3353534A
Cited
US3345642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-13 | 1973-10-13 | 1974-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-13 | 1977-10-13 | 1978-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-13 | 1981-10-13 | 1982-04-14 | $7700.00 | Window Closed / Lapsed |