US970284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-pressure valve-regulator.
Assignee: W E ZIERDEN
•
Filing: 1909-08-16
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Granted: 1910-09-13
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Expires: 1929-08-16
Abstract
No abstract record available.
Inventors
- 👤 Thomas M Wilkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:03
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/0616; G05D16/0619; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7796; Y10T137/7809; Y10T137/7812; Y10T137/7813
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) | 1913-09-12 | 1914-03-14 | 1914-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1917-09-12 | 1918-03-14 | 1918-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1921-09-12 | 1922-03-14 | 1922-09-13 | $7700.00 | Window Closed / Lapsed |