Patent US3389746A successfully refreshed from Google Patents.
US3389746A
Expired / Lapsed
US
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Rotary regenerator having concentric cylindrical matrices
Assignee: Avco Corp
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Filing: 1967-06-21
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Granted: 1968-06-25
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Expires: 1987-06-21
Abstract
No abstract record available.
Inventors
- 👤 Straniti Salvatore
- 👤 Richard E Kish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:08
CPC Classifications
F; F28; F28D; F28D19/00; F28D19/04; F28D19/041; F28D19/042; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/013; Y10S165/016; Y10S165/02; Y10S165/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2680008A
Cited
GB739904A
Cited
GB776532A
Cited
GB776533A
Cited
US2892615A
Cited
US2944798A
Cited
US3079991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |