US2944544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Respirators, particularly for submarine use
Assignee: Individual
•
Filing: 1956-12-26
•
Granted: 1960-07-12
•
Expires: 1976-12-26
Abstract
No abstract record available.
Inventors
- 👤 Lundgren Claes Erik Gunnar
- 👤 Arborelius Mans Mansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:42
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2764151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |