Patent US2067953A successfully refreshed from Google Patents.
US2067953A
Expired / Lapsed
US
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Valve
Assignee: Individual
•
Filing: 1931-06-22
•
Granted: 1937-01-19
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Expires: 1951-06-22
Abstract
No abstract record available.
Inventors
- 👤 Spence Paulsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:18
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/20; G05D16/2006; G05D16/2013; G05D16/202; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7805
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) | 1940-01-19 | 1940-07-20 | 1941-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-01-19 | 1944-07-20 | 1945-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-01-19 | 1948-07-20 | 1949-01-19 | $7700.00 | Window Closed / Lapsed |