Patent US2257724A successfully refreshed from Google Patents.
US2257724A
Expired / Lapsed
US
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Transmission
Assignee: Individual
•
Filing: 1936-09-12
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Granted: 1941-10-07
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Expires: 1956-09-12
Abstract
No abstract record available.
Inventors
- 👤 David S Bennetch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:49
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/26; F04B1/30; F04B1/32; F04B1/324; F04B1/20; F04B1/2007; F04B1/2014; F04B1/2035; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/42; F16H61/421; F16H61/431
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) | 1944-10-06 | 1945-04-07 | 1945-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-10-06 | 1949-04-07 | 1949-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-10-06 | 1953-04-07 | 1953-10-07 | $7700.00 | Window Closed / Lapsed |