Patent US1772879A successfully refreshed from Google Patents.
US1772879A
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Pressure-regulating device
Assignee: Individual
•
Filing: 1924-10-29
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Granted: 1930-08-12
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Expires: 1944-10-29
Abstract
No abstract record available.
Inventors
- 👤 Stearns Frank Ballou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:35
CPC Classifications
F; F02; F02B; F02B1/00; F02M; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/438; F02M2700/4388; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/264; Y10T137/8158; Y10T137/8326; Y10T137/8593; Y10T137/85978; Y10T137/86171
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) | 1933-08-11 | 1934-02-10 | 1934-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-08-11 | 1938-02-10 | 1938-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-08-11 | 1942-02-10 | 1942-08-12 | $7700.00 | Window Closed / Lapsed |