US2695072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Backwater valve
Assignee: Individual
•
Filing: 1951-10-23
•
Granted: 1954-11-23
•
Expires: 1971-10-23
Abstract
No abstract record available.
Inventors
- 👤 Hauslein Adam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:11
CPC Classifications
E; E03; E03F; E03F7/00; E03F7/02; E03F7/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7439; Y10T137/7475; Y10T137/7485; Y10T137/8593; Y10T137/85978; Y10T137/86171
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191021646A
Cited
US1205199A
Cited
US1732319A
Cited
FR682295A
Cited
US2203688A
Cited
US2421066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |