Patent USD318331S successfully refreshed from Google Patents.
US1814812A
Expired / Lapsed
US
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Fluid flow regulating mechanism
Assignee: Surface Combustion Corp
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Filing: 1930-01-29
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Granted: 1931-07-14
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Expires: 1950-01-29
Abstract
No abstract record available.
Inventors
- 👤 Albert L Klees
- 👤 Greenfield Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:29
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/007; F23N1/02; F23N1/027
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) | 1934-07-13 | 1935-01-12 | 1935-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-07-13 | 1939-01-12 | 1939-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-07-13 | 1943-01-12 | 1943-07-14 | $7700.00 | Window Closed / Lapsed |