US1996302A
Expired / Lapsed
US
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Method of controlling steam apparatus
Assignee: LYLE A HALL
•
Filing: 1934-10-03
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Granted: 1935-04-02
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Expires: 1954-10-03
Abstract
No abstract record available.
Inventors
- 👤 Mason Gilmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:00
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/10; F24D19/1003; Y; Y10; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2774; Y10T137/7287; Y10T137/7339; Y10T137/7355; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86421; Y10T137/86437; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2102
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) | 1938-04-01 | 1938-10-01 | 1939-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-04-01 | 1942-10-01 | 1943-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-04-01 | 1946-10-01 | 1947-04-02 | $7700.00 | Window Closed / Lapsed |