US2051180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatically operated valve mechanism
Assignee: Standard Oil Company of California
•
Filing: 1933-12-19
•
Granted: 1936-08-18
•
Expires: 1953-12-19
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Ruzicka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:40
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3006; Y10T137/3021; Y10T137/304; Y10T137/3052; Y10T137/7287; Y10T137/7306
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) | 1939-08-18 | 1940-02-17 | 1940-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-08-18 | 1944-02-17 | 1944-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-08-18 | 1948-02-17 | 1948-08-18 | $7700.00 | Window Closed / Lapsed |