US2812774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modulating and shut-off valve
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1951-12-20
•
Granted: 1957-11-12
•
Expires: 1971-12-20
Abstract
No abstract record available.
Inventors
- 👤 Robert J Anderson
- 👤 Allen E Lepley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:06
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F02; F02C; F02C9/00; F02C9/26; F02C9/263; G; G05; G05D; G05D7/00; G05D7/01; G05D7/0193; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |