US2737876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator structure
Assignee: Individual
•
Filing: 1952-12-17
•
Granted: 1956-03-13
•
Expires: 1972-12-17
Abstract
No abstract record available.
Inventors
- 👤 Lester L Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:04
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US129713A
Cited
US547356A
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US1648591A
Cited
US1611198A
Cited
DE439020C
Cited
US1732435A
Cited
US2115720A
Cited
US2395162A
Cited
US2509016A
Cited
GB637845A
Cited
US2566156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |