Patent US1632559A successfully refreshed from Google Patents.
US1205729A
Expired / Lapsed
US
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Pressure-regulating apparatus.
Assignee: Individual
•
Filing: 1915-06-28
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Granted: 1916-11-21
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Expires: 1935-06-28
Abstract
No abstract record available.
Inventors
- 👤 Robert L Frink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:30
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/20; G05D16/2006; G05D16/2013; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7797; Y10T137/8593; Y10T137/86389; Y10T137/86397
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) | 1919-11-21 | 1920-05-22 | 1920-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1923-11-21 | 1924-05-22 | 1924-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1927-11-21 | 1928-05-22 | 1928-11-21 | $7700.00 | Window Closed / Lapsed |