US1367911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stopcock and check-valve
Assignee: Individual
•
Filing: 1920-06-01
•
Granted: 1921-02-08
•
Expires: 1940-06-01
Abstract
No abstract record available.
Inventors
- 👤 Charles C Koplin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:58
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/18; F16K15/182; F16K15/1821
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) | 1924-02-08 | 1924-08-09 | 1925-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-02-08 | 1928-08-09 | 1929-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-02-08 | 1932-08-09 | 1933-02-08 | $7700.00 | Window Closed / Lapsed |