Patent US2568401A successfully refreshed from Google Patents.
US2568401A
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Control device
Assignee: Westinghouse Electric Corp
•
Filing: 1945-10-19
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Granted: 1951-09-18
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Expires: 1965-10-19
Abstract
No abstract record available.
Inventors
- 👤 Lawrence B Lynn
- 👤 Clinton R Hanna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:00
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/22; B61F5/24; Y; Y10; Y10T; Y10T137/00; Y10T137/0753; Y10T137/0923
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1319848A
Cited
US1861821A
Cited
GB346493A
Cited
US2166956A
Cited
DE612843C
Cited
US2063747A
Cited
US2147990A
Cited
US2212426A
Cited
US2492990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |