US1643753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butterfly valve
Assignee: Individual
•
Filing: 1926-09-13
•
Granted: 1927-09-27
•
Expires: 1946-09-13
Abstract
No abstract record available.
Inventors
- 👤 Donald W Slattery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:18
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/221; Y; Y10; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2774; Y10T137/2802; Y10T137/2815; Y10T137/2822; Y10T137/8593; Y10T137/86493; Y10T137/86879
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) | 1930-09-26 | 1931-03-28 | 1931-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-09-26 | 1935-03-28 | 1935-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-09-26 | 1939-03-28 | 1939-09-27 | $7700.00 | Window Closed / Lapsed |