US2746477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum breakers
Assignee: Sloan Valve Co
•
Filing: 1950-06-23
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Granted: 1956-05-22
•
Expires: 1970-06-23
Abstract
No abstract record available.
Inventors
- 👤 Carl H Krause
- 👤 Jacques J Filliung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:50
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/02; E03C1/10; E03C1/102; E03C1/108; Y; Y10; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185; Y10T137/3294; Y10T137/3331; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888
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) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |