US783493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Back-pressure valve for traps.
Assignee: Individual
•
Filing: 1904-04-21
•
Granted: 1905-02-28
•
Expires: 1924-04-21
Abstract
No abstract record available.
Inventors
- 👤 William J Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:29
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/147; E; E03; E03C; E03C1/00; E03C1/12; E03C1/28; B01D2201/00; B01D2201/40; B01D2201/4046
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) | 1908-02-28 | 1908-08-29 | 1909-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1912-02-28 | 1912-08-29 | 1913-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1916-02-28 | 1916-08-29 | 1917-02-28 | $7700.00 | Window Closed / Lapsed |