Patent US3119446A successfully refreshed from Google Patents.
US3119446A
Expired / Lapsed
US
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Heat exchangers
Assignee: American Thermocatalytic Corp
•
Filing: 1959-09-17
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Granted: 1964-01-28
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Expires: 1979-09-17
Abstract
No abstract record available.
Inventors
- 👤 Weiss Gerhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:47
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/02; F28F1/00; F28F1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2100772A
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US2596642A
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US2963083A
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US2715598A
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US2840897A
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US2848200A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |