US2699180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relief valve with self-aligning seat
Assignee: Dowty Equipment Ltd
•
Filing: 1952-07-17
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Granted: 1955-01-11
•
Expires: 1972-07-17
Abstract
No abstract record available.
Inventors
- 👤 Colin M Frye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:06
CPC Classifications
F; F16; F16K; F16K27/00; E; E21; E21D; E21D15/00; E21D15/005; E21D15/50; E21D15/51; E21D15/512; F16K15/00; F16K15/02; F16K15/04; F16K15/044; F16K17/00; F16K17/02; F16K17/04; F16K17/0406; F16K17/0486; G; G05; G05D; G05D16/00; G05D16/04; G05D16/10; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/599; Y10T137/6031; Y10T137/6035; Y10T137/6038; Y10T137/6041; Y10T137/7722; Y10T137/7837; Y10T137/7876; Y10T137/7904; Y10T137/7922; Y10T137/7927; Y10T137/7928
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US424715A
Cited
USRE17022E
Cited
US1734582A
Cited
US1811556A
Cited
US1999693A
Cited
US2330610A
Cited
US2332629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-10 | 1958-07-12 | 1959-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-10 | 1962-07-12 | 1963-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-10 | 1966-07-12 | 1967-01-11 | $7700.00 | Window Closed / Lapsed |