US643099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-regulating device.
Assignee: Individual
•
Filing: 1899-07-27
•
Granted: 1900-02-13
•
Expires: 1919-07-27
Abstract
No abstract record available.
Inventors
- 👤 John Henry Ayasse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:25
CPC Classifications
B; B01; B01J; B01J4/00; B01J4/001; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3124; Y10T137/3127; Y10T137/313; Y10T137/4673; Y10T137/4857; Y10T137/9029; Y10T137/9138
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) | 1903-02-13 | 1903-08-15 | 1904-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-02-13 | 1907-08-15 | 1908-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-02-13 | 1911-08-15 | 1912-02-14 | $7700.00 | Window Closed / Lapsed |