US3348290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating a heat exchanger from a single cast ingot by rolling heat treating and bonding
Assignee: Olin Corp
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Filing: 1966-07-15
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Granted: 1967-10-24
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Expires: 1986-07-15
Abstract
No abstract record available.
Inventors
- 👤 Broverman Irwin
- 👤 Jagaciak George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:01
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/04; B; B21; B21D; B21D53/00; B21D53/02; C22C; C22C21/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366; Y10T29/49369; Y10T29/49371; Y10T29/49396
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |