US3461908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum relief valve
Assignee: Broughton Corp
•
Filing: 1967-04-06
•
Granted: 1969-08-19
•
Expires: 1987-04-06
Abstract
No abstract record available.
Inventors
- 👤 Douglas H Newcomb
- 👤 Charles B Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:02
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/10; F16K17/105; D; D21; D21F; D21F1/00; D21F1/48; G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0644; G05D16/0655; G05D16/0658; G05D16/0663; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2546; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7769; Y10T137/777
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2343146A
Cited
US2583006A
Cited
US2692612A
Cited
US2955612A
Cited
US2959352A
Cited
US3079121A
Cited
US3153424A
Cited
US3071146A
Cited
US3139899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |