US894018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic pressure-controlling device.
Assignee: FOSTER ENGINEERING CO
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Filing: 1906-04-13
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Granted: 1908-07-21
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Expires: 1926-04-13
Abstract
No abstract record available.
Inventors
- 👤 William F Krichbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:55
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0644; G05D16/0663; G05D16/0666; G05D16/14; G05D16/16; G05D16/166; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7769; Y10T137/8593; Y10T137/87265; Y10T137/8733
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) | 1911-07-21 | 1912-01-20 | 1912-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-07-21 | 1916-01-20 | 1916-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-07-21 | 1920-01-20 | 1920-07-21 | $7700.00 | Window Closed / Lapsed |