Patent US1882850A successfully refreshed from Google Patents.
US1882850A
Expired / Lapsed
US
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Frequency producer
Assignee: AT&T Inc
•
Filing: 1929-08-05
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Granted: 1932-10-18
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Expires: 1949-08-05
Abstract
No abstract record available.
Inventors
- 👤 Warren A Marrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:31
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/50; F16D3/64; F16D3/66; H; H01; H01J; H01J31/00; H01J31/02; H01J31/04; H01J31/06; H03; H03B; H03B13/00; H03B19/00; H03B19/06; H03B19/08; H03B19/10; Y; Y10; Y10S; Y10S84/00; Y10S84/06
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) | 1935-10-18 | 1936-04-18 | 1936-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-10-18 | 1940-04-18 | 1940-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-10-18 | 1944-04-18 | 1944-10-18 | $7700.00 | Window Closed / Lapsed |