Patent US1151522A successfully refreshed from Google Patents.
US1151522A
Expired / Lapsed
US
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Oil-actuated valve mechanism for steam-turbines.
Assignee: COLONIAL TRUST CO
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Filing: 1910-02-10
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Granted: 1915-08-24
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Expires: 1930-02-10
Abstract
No abstract record available.
Inventors
- 👤 Francis Hodgkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:01
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/20; F01D17/22; F01D17/26; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86928
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) | 1918-08-23 | 1919-02-22 | 1919-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1922-08-23 | 1923-02-22 | 1923-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1926-08-23 | 1927-02-22 | 1927-08-24 | $7700.00 | Window Closed / Lapsed |