US2888034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
One-piece double check valve
Assignee: Individual
•
Filing: 1956-08-02
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Granted: 1959-05-26
•
Expires: 1976-08-02
Abstract
No abstract record available.
Inventors
- 👤 Glegg Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:08
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/109; F04B53/1092; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/44; F16K1/443; Y; Y10; Y10S; Y10S137/00; Y10S137/904; Y10S251/00; Y10S251/902; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7843
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) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |