Patent US1988816A successfully refreshed from Google Patents.
US2117800A
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Fluid pressure control apparatus
Assignee: Brown Instruments Co
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Filing: 1935-07-19
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Granted: 1938-05-17
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Expires: 1955-07-19
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Harrison
- 👤 Frederick W Side
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:12
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/12; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/2278; Y10T137/2409; Y10T137/2452
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) | 1941-05-16 | 1941-11-15 | 1942-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-05-16 | 1945-11-15 | 1946-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-05-16 | 1949-11-15 | 1950-05-17 | $7700.00 | Window Closed / Lapsed |