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Patent US3109671A successfully refreshed from Google Patents.
US3109671A
Expired / Lapsed
US
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Tube coupling for heat exchanger and the like
Assignee: Standard Oil Co
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Filing: 1960-02-12
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Granted: 1963-11-05
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Expires: 1980-02-12
Abstract
No abstract record available.
Inventors
- 👤 Braun Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:40
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/18; F16L39/00; F16L39/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1512219A
Cited
US2211173A
Cited
US2520755A
Cited
US2695182A
Cited
US2745689A
Cited
US3002769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |