US2897835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum breaker
Assignee: Imperial Brass Manufacturing Co
•
Filing: 1956-02-29
•
Granted: 1959-08-04
•
Expires: 1976-02-29
Abstract
No abstract record available.
Inventors
- 👤 Howard L Philippe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:35
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K15/147; F16K15/1471; E; E03; E03C; E03C1/00; E03C1/02; E03C1/10; E03C1/102; E03C1/108; F16K15/1402; Y; Y10; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185; Y10T137/3294; Y10T137/3331; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/784; Y10T137/7859; Y10T137/786; Y10T137/7879; Y10T137/788; Y10T137/7882; Y10T137/7885
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2191458A
Cited
US2092757A
Cited
US2322631A
Cited
US2629393A
Cited
US2646063A
Cited
US2663309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |