US2999308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Olin Corp
•
Filing: 1957-06-03
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Granted: 1961-09-12
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Expires: 1977-06-03
Abstract
No abstract record available.
Inventors
- 👤 Theron F Pauls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:25
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/12; F28F3/14; B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; B21D53/045; F25; F25B; F25B2339/00; F25B2339/04; F25B2339/043; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366; Y10T29/49369; Y10T29/49371; Y10T29/49377; Y10T29/49378; Y10T29/4938
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR962430A
Cited
US1962954A
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US2047207A
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US2190494A
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US2375334A
Cited
US2626130A
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US2662273A
Cited
US2759247A
Cited
US2740188A
Cited
US2856162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |