Patent US3537513A successfully refreshed from Google Patents.
US3537513A
Expired / Lapsed
US
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Three-fluid heat exchanger
Assignee: Garrett Corp
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Filing: 1968-03-11
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Granted: 1970-11-03
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Expires: 1988-03-11
Abstract
No abstract record available.
Inventors
- 👤 Irving G Austin
- 👤 David G Bridgnell
- 👤 Robert C Kinsell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:30
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/0031; F28D9/0043; F28D9/0056; F28D9/0093; F28F; F28F1/00; F28F1/10; F28F13/00; F28F13/06; F28F3/00; F28F3/02; F28F3/025; F28F3/027; F28F9/00; F28F9/007; F28F9/0075; F28D21/00; F28D21/0001; F28D21/0003; F28F2250/00; F28F2250/10; F28F2250/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |