US3455324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for preventing return-flow of liquid from a receptacle supplied under pressure by a supply network back into the latter
Assignee: SUSTEN ANSTALT
•
Filing: 1966-04-08
•
Granted: 1969-07-15
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Expires: 1986-04-08
Abstract
No abstract record available.
Inventors
- 👤 Rudolf Bieri
- 👤 Hans Bieri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:49
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/02; E03C1/10; E03C1/102; E03D; E03D5/00; E03D5/02; E03D5/026; E03D9/00; E03D9/08; Y; Y10; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3072137A
Cited
US1830955A
Cited
US2056357A
Cited
US2287534A
Cited
US3183923A
Cited
US3155106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |