US2736333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low pressure sealing valves
Assignee: Individual
•
Filing: 1951-12-07
•
Granted: 1956-02-28
•
Expires: 1971-12-07
Abstract
No abstract record available.
Inventors
- 👤 Burton W Hancox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:19
CPC Classifications
F; F16; F16K; F16K21/00; F16K21/04; Y; Y10; Y10T; Y10T137/00; Y10T137/3584; Y10T137/374; Y10T137/7722; Y10T137/7837; Y10T137/7869; Y10T137/7871
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US544167A
Cited
US605549A
Cited
GB189621847A
Cited
GB189713441A
Cited
US641345A
Cited
US922578A
Cited
US2084294A
Cited
US2333288A
Cited
FR923625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |