US1541540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antifouling trap valve
Assignee: Individual
•
Filing: 1924-07-30
•
Granted: 1925-06-09
•
Expires: 1944-07-30
Abstract
No abstract record available.
Inventors
- 👤 Harry E Weir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:15
CPC Classifications
E; E03; E03F; E03F7/00; E03F7/02; E03F7/04; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/7722; Y10T137/7837; Y10T137/7898; Y10T137/7902; Y10T137/8593; Y10T137/877
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) | 1928-06-08 | 1928-12-08 | 1929-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-06-08 | 1932-12-08 | 1933-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-06-08 | 1936-12-08 | 1937-06-09 | $7700.00 | Window Closed / Lapsed |