US2897833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Respiratory apparatus
Assignee: Individual
•
Filing: 1956-02-14
•
Granted: 1959-08-04
•
Expires: 1976-02-14
Abstract
No abstract record available.
Inventors
- 👤 Henry W Seeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:22
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/10; A61M16/12; Y; Y10; Y10S; Y10S137/00; Y10S137/908; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2499; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7796; Y10T137/7805
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1172765A
Cited
US1933733A
Cited
US2269500A
Cited
US2630129A
Cited
US2767727A
Cited
US2774352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |