Patent US3368615A successfully refreshed from Google Patents.
US3368615A
Expired / Lapsed
US
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Heat exchanger construction
Assignee: Motors Liquidation Co
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Filing: 1965-12-02
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Granted: 1968-02-13
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Expires: 1985-12-02
Abstract
No abstract record available.
Inventors
- 👤 Richard C Brown
- 👤 Robert S Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:47
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/007; F28F9/013; F25; F25B; F25B39/00; F25B39/02; F25D; F25D17/00; F25D17/04; F25D17/06; F25D17/062; F25D17/065; F28D; F28D7/00; F28D7/08; F28D7/082; F28D7/085; F28F1/00; F28F1/10; F28F1/12; F28F1/34; F28F1/36; F25D2317/00; F25D2317/06; F25D2317/065; F25D2317/0653; F25D2400/00; F25D2400/04; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/471; Y10S165/48; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1951657A
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US2021117A
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US2286271A
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US2553142A
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GB799083A
Cited
GB805630A
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US2963779A
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US3279535A
Cited
US3294162A
Cited
US3333317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-12 | 1971-08-14 | 1972-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-12 | 1975-08-14 | 1976-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-12 | 1979-08-14 | 1980-02-13 | $7700.00 | Window Closed / Lapsed |