US2839053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breathing apparatus for divers
Assignee: Individual
•
Filing: 1953-09-21
•
Granted: 1958-06-17
•
Expires: 1973-09-21
Abstract
No abstract record available.
Inventors
- 👤 Robert L Lorenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:51
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/186; B63C11/22; B63C11/2209; Y; Y10; Y10S; Y10S137/00; Y10S137/908
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |