Patent US3937192A successfully refreshed from Google Patents.
Patent US1402875A successfully refreshed from Google Patents.
US1402875A
Expired / Lapsed
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Power-developing apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1919-08-08
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Granted: 1922-01-10
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Expires: 1939-08-08
Abstract
No abstract record available.
Inventors
- 👤 Edgar W Mccallister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:45
CPC Classifications
B; B63; B63H; B63H23/00; B63H23/22; B63H23/24; B63H21/00; B63H21/12; B63H21/17; B63H21/24; B63H5/00; B63H5/07; B63H5/08; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19126
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) | 1925-01-09 | 1925-07-11 | 1926-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-01-09 | 1929-07-11 | 1930-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-01-09 | 1933-07-11 | 1934-01-10 | $7700.00 | Window Closed / Lapsed |