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Patent US3003750A successfully refreshed from Google Patents.
US3003750A
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Seal for rotary regenerator
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1958-09-08
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Granted: 1961-10-10
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Expires: 1978-09-08
Abstract
No abstract record available.
Inventors
- 👤 Hess Anton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:04
CPC Classifications
F; F28; F28D; F28D19/00; F28D19/04; F28D19/047; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/013; Y10S165/016; Y10S165/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
GB651771A
Cited
GB649265A
Cited
GB679169A
Cited
US2747843A
Cited
US2865611A
Cited
US2888248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-09 | 1965-04-10 | 1965-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-09 | 1969-04-10 | 1969-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-09 | 1973-04-10 | 1973-10-10 | $7700.00 | Window Closed / Lapsed |