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US2587375A
Expired / Lapsed
US
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Atmospheric pressure regulator
Assignee: Individual
•
Filing: 1945-05-17
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Granted: 1952-02-26
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Expires: 1965-05-17
Abstract
No abstract record available.
Inventors
- 👤 William R Paulsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:41
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0644; G05D16/0655; Y; Y10; Y10S; Y10S137/00; Y10S137/907; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7754; Y10T137/7756; Y10T137/7757
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191404930A
Cited
DE447605C
Cited
US1950121A
Cited
DE616061C
Cited
US2106234A
Cited
US2137025A
Cited
US2305975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |