Patent US2887303A successfully refreshed from Google Patents.
US2887303A
Expired / Lapsed
US
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Heat exchanger
Assignee: Falls Industries Inc
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Filing: 1956-05-04
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Granted: 1959-05-19
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Expires: 1976-05-04
Abstract
No abstract record available.
Inventors
- 👤 Reys John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:08
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/02; F28D; F28D7/00; F28D7/16; F28D7/163; F28F7/00; F28F7/02; Y; Y10; Y10S; Y10S165/00; Y10S165/051; Y10S165/052; Y10S165/053; Y10S165/054; Y10S165/055; Y10S165/056; Y10S165/905
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |