US2874692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Open-cycle breathing equipment, particularly for skin-divers
Assignee: Individual
•
Filing: 1955-09-14
•
Granted: 1959-02-24
•
Expires: 1975-09-14
Abstract
No abstract record available.
Inventors
- 👤 Galeazzi Roberto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:46
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/22; B63C11/2236; A; A62; A62B; A62B9/00; A62B9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US439093A
Cited
FR1078875A
Cited
US2485908A
Cited
US2484044A
Cited
US2695609A
Cited
US2810387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |