US2883998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum control valve
Assignee: Individual
•
Filing: 1954-01-14
•
Granted: 1959-04-28
•
Expires: 1974-01-14
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Broughton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:08
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0644; G05D16/0655; D; D21; D21F; D21F1/00; D21F1/48; F; F16; F16K; F16K31/00; F16K31/12; F16K31/126; F16K31/1262; Y; Y10; Y10S; Y10S137/00; Y10S137/907; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2607
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1501331A
Cited
US1962477A
Cited
US2147877A
Cited
US2252152A
Cited
US2305519A
Cited
US2556308A
Cited
US2731026A
Cited
US2745322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |