Patent US3433222A successfully refreshed from Google Patents.
US3433222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Under-water diving equipment
Assignee: Bioengionics Inc
•
Filing: 1966-04-01
•
Granted: 1969-03-18
•
Expires: 1986-04-01
Abstract
No abstract record available.
Inventors
- 👤 Olympio F Pinto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:12
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/22; B63C11/2227; B63C11/12; B63C11/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1174780A
Cited
US1264706A
Cited
US1477627A
Cited
US2388674A
Cited
US2652221A
Cited
GB814854A
Cited
US2852023A
Cited
US3292618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |