Patent US3544138A successfully refreshed from Google Patents.
US3544138A
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Coupling assembly for conduits
Assignee: ULRICH C VON EIFF
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Filing: 1969-04-07
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Granted: 1970-12-01
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Expires: 1989-04-07
Abstract
No abstract record available.
Inventors
- 👤 Ulrich C Von Eiff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:00
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/04; F16L23/08; F16L23/10; F16B; F16B2200/00; F16B2200/50; F16B2200/509
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) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |