Patent US3437134A successfully refreshed from Google Patents.
US3437134A
Expired / Lapsed
US
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Heat exchanger
Assignee: LONG MANUFACTURING Ltd A CORP OF CANADA
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Filing: 1965-10-24
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Granted: 1969-04-08
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Expires: 1985-10-24
Abstract
No abstract record available.
Inventors
- 👤 Edward P Oddy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:06
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/24; F28F1/32; F28F1/325; B; B21; B21D; B21D53/00; B21D53/02; B21D53/08; B21D53/085; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/50; Y10S165/501; Y10S165/502; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/4938
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) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |