US2887120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Halkey Roberts Corp
•
Filing: 1957-02-25
•
Granted: 1959-05-19
•
Expires: 1977-02-25
Abstract
No abstract record available.
Inventors
- 👤 See Peter G De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:24
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/20; F16K15/202; Y; Y10; Y10T; Y10T137/00; Y10T137/3584
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |