Patent US3406783A successfully refreshed from Google Patents.
US3406783A
Expired / Lapsed
US
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Soundproof pipe connection
Assignee: GESELLSCHAFT fur TECHNISCHEN FORTSCHRITT MBH
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Filing: 1966-06-13
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Granted: 1968-10-22
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Expires: 1986-06-13
Abstract
No abstract record available.
Inventors
- 👤 Haffer Dieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:47
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/02; F16L55/033; F16L55/0332; F16L27/00; F16L27/10; F16L27/1021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1318158A
Cited
US781939A
Cited
AU119704B
Cited
US2126706A
Cited
US2270902A
Cited
CH323094A
Cited
US3237715A
Cited
US3038553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |