Patent US3481394A successfully refreshed from Google Patents.
US3481394A
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Configuration of heat transfer tubing for vapor condensation on its outer surface
Assignee: WOLVERINE ACQUISITION CORP A DE CORP
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Filing: 1967-06-26
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Granted: 1969-12-02
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Expires: 1987-06-26
Abstract
No abstract record available.
Inventors
- 👤 James G Withers Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:57
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/20; B21C37/207; B21D; B21D15/00; B21D15/04; F; F28; F28B; F28B1/00; F28B1/02; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/34; F28F1/36; F28F1/42; F28F1/422; F28F13/00; F28F13/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/49382; Y10T29/49384
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) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |