Patent US937844A successfully refreshed from Google Patents.
US937844A
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US
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Power-controlling apparatus.
Assignee: Individual
•
Filing: 1907-02-19
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Granted: 1909-10-26
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Expires: 1927-02-19
Abstract
No abstract record available.
Inventors
- 👤 William R Mckeen Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:58
CPC Classifications
B; B61; B61C; B61C15/00; B61C15/02; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19377; Y10T74/19414; Y10T74/19419; Y10T74/19442; Y10T74/19451; Y10T74/19456; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/2063
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) | 1912-10-25 | 1913-04-26 | 1913-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-10-25 | 1917-04-26 | 1917-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-10-25 | 1921-04-26 | 1921-10-26 | $7700.00 | Window Closed / Lapsed |