US1216872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reducing-valve.
Assignee: Individual
•
Filing: 1916-06-24
•
Granted: 1917-02-20
•
Expires: 1936-06-24
Abstract
No abstract record available.
Inventors
- 👤 Charles Neville Sowden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:56
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/0433; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781
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) | 1920-02-20 | 1920-08-21 | 1921-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-02-20 | 1924-08-21 | 1925-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-02-20 | 1928-08-21 | 1929-02-20 | $7700.00 | Window Closed / Lapsed |