Patent US3087707A successfully refreshed from Google Patents.
Patent US2993682A successfully refreshed from Google Patents.
US2993682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger tubes
Assignee: Individual
•
Filing: 1958-02-24
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Granted: 1961-07-25
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Expires: 1978-02-24
Abstract
No abstract record available.
Inventors
- 👤 Huet Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:34
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/08; B; B01; B01D; B01D1/00; B01D1/06; B01D1/10; B01D45/00; B01D45/12; F22; F22B; F22B1/00; F22B1/02; F22B1/16; F22B1/162; F22D; F22D1/00; F22D1/006; F22D1/02; F22D1/36; F28D; F28D7/00; F28D7/02; F28D7/022; F28D7/026; Y; Y10; Y10S; Y10S165/00; Y10S165/183
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) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |