US1879450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator
Assignee: BURT Manufacturing CO
•
Filing: 1929-06-14
•
Granted: 1932-09-27
•
Expires: 1949-06-14
Abstract
No abstract record available.
Inventors
- 👤 Clarence A Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:55
CPC Classifications
F; F04; F04D; F04D25/00; F04D25/02; F04D25/08; F04D25/12; F04D25/14; F04D29/00; F04D29/60; F04D29/64; F04D29/644; F04D29/646; F24; F24F; F24F7/00; F24F7/02; F24F7/025; F24F13/00; F24F13/20; F24F2013/205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1935-09-27 | 1936-03-28 | 1936-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-09-27 | 1940-03-28 | 1940-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-09-27 | 1944-03-28 | 1944-09-27 | $7700.00 | Window Closed / Lapsed |