Patent US2074889A successfully refreshed from Google Patents.
US2074889A
Expired / Lapsed
US
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Compensating volume control safety device
Assignee: DAVID H DUNHAM
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Filing: 1936-05-16
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Granted: 1937-03-23
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Expires: 1956-05-16
Abstract
No abstract record available.
Inventors
- 👤 Eldred B Brannan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:30
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/28; B60T11/32; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7723; Y10T137/7726; Y10T137/7727; Y10T137/8593; Y10T137/87265
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) | 1940-03-22 | 1940-09-21 | 1941-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-03-22 | 1944-09-21 | 1945-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-03-22 | 1948-09-21 | 1949-03-23 | $7700.00 | Window Closed / Lapsed |