US631036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible check-valve.
Assignee: Individual
•
Filing: 1899-02-04
•
Granted: 1899-08-15
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Expires: 1919-02-04
Abstract
No abstract record available.
Inventors
- 👤 George M Crump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:32
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/03; Y; Y10; Y10T; Y10T137/00; Y10T137/5109; Y10T137/5153; Y10T137/7722; Y10T137/7837; Y10T137/7854; Y10T137/7856
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) | 1902-08-15 | 1903-02-14 | 1903-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1906-08-15 | 1907-02-14 | 1907-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1910-08-15 | 1911-02-14 | 1911-08-16 | $7700.00 | Window Closed / Lapsed |