US3027144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for rotary regenerator
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1958-07-23
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Granted: 1962-03-27
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Expires: 1978-07-23
Abstract
No abstract record available.
Inventors
- 👤 Hess Anton
- 👤 Barish Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:12
CPC Classifications
F; F28; F28D; F28D19/00; F28D19/04; F28D19/047; F02; F02C; F02C7/00; F02C7/08; F02C7/10; F02C7/105; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/013; Y10S165/016; Y10S165/02; Y10S165/021; Y10S165/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB679169A
Cited
US2643097A
Cited
GB634627A
Cited
US2747843A
Cited
US2743945A
Cited
US2836398A
Cited
US2888248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |