US937728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow-regulating device.
Assignee: Individual
•
Filing: 1907-10-12
•
Granted: 1909-10-19
•
Expires: 1927-10-12
Abstract
No abstract record available.
Inventors
- 👤 Grace A Twiford
- 👤 Nicholas S Twiford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:54
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; F16K31/20; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7423; Y10T137/7426
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) | 1912-10-18 | 1913-04-19 | 1913-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-10-18 | 1917-04-19 | 1917-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-10-18 | 1921-04-19 | 1921-10-19 | $7700.00 | Window Closed / Lapsed |