US681076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic valve for presses.
Assignee: Individual
•
Filing: 1901-01-17
•
Granted: 1901-08-20
•
Expires: 1921-01-17
Abstract
No abstract record available.
Inventors
- 👤 David W Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:13
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/8671
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) | 1904-08-19 | 1905-02-18 | 1905-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-08-19 | 1909-02-18 | 1909-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-08-19 | 1913-02-18 | 1913-08-20 | $7700.00 | Window Closed / Lapsed |