US2622762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valved closure assembly
Assignee: MALCOLM W FRASER
•
Filing: 1947-05-14
•
Granted: 1952-12-23
•
Expires: 1967-05-14
Abstract
No abstract record available.
Inventors
- 👤 John B Parsons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:29
CPC Classifications
B; B60; B60K; B60K15/00; B60K15/03; B60K15/04; B60K15/0406; Y; Y10; Y10S; Y10S220/00; Y10S220/32; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US977372A
Cited
US1885121A
Cited
US2133575A
Cited
US2135551A
Cited
US2214364A
Cited
US2266314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |