US2429546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valveless pressure regulator
Assignee: Individual
•
Filing: 1943-02-23
•
Granted: 1947-10-21
•
Expires: 1963-02-23
Abstract
No abstract record available.
Inventors
- 👤 Sida S Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:59
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/0616; G05D16/0619; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7805; Y10T137/7806; Y10T137/7808
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1517485A
Cited
US726962A
Cited
US1657663A
Cited
US1905583A
Cited
US2025247A
Cited
US2341525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-20 | 1951-04-21 | 1951-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-20 | 1955-04-21 | 1955-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-20 | 1959-04-21 | 1959-10-21 | $7700.00 | Window Closed / Lapsed |