US1233391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Back-water sewer-valve.
Assignee: Individual
•
Filing: 1914-09-10
•
Granted: 1917-07-17
•
Expires: 1934-09-10
Abstract
No abstract record available.
Inventors
- 👤 George L Mullane
- 👤 Albert C Ekman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:55
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/50; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7898; Y10T137/7903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1920-07-16 | 1921-01-15 | 1921-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-07-16 | 1925-01-15 | 1925-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-07-16 | 1929-01-15 | 1929-07-17 | $7700.00 | Window Closed / Lapsed |