US2521310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen demand pressure breathing regulator
Assignee: Garrett Corp
•
Filing: 1945-06-19
•
Granted: 1950-09-05
•
Expires: 1965-06-19
Abstract
No abstract record available.
Inventors
- 👤 Herman P Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:50
CPC Classifications
A; A62; A62B; A62B9/00; A62B9/02; A62B9/022; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7822; Y10T137/783
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US338353A
Cited
US410178A
Cited
US890238A
Cited
US952416A
Cited
US925812A
Cited
US1131190A
Cited
US1649566A
Cited
US1892883A
Cited
US1922954A
Cited
US2387123A
Cited
US2310022A
Cited
US2310189A
Cited
US2378468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |