US1240682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-acting valve.
Assignee: Individual
•
Filing: 1917-05-10
•
Granted: 1917-09-18
•
Expires: 1937-05-10
Abstract
No abstract record available.
Inventors
- 👤 Thomas Albert Crompton Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:11
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/18; F16K17/19; F16K17/196; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771; Y10T137/7772; Y10T137/7777; Y10T137/8376
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) | 1920-09-17 | 1921-03-19 | 1921-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-09-17 | 1925-03-19 | 1925-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-09-17 | 1929-03-19 | 1929-09-18 | $7700.00 | Window Closed / Lapsed |