US1448401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-pressure regulator
Assignee: Westinghouse Electric Corp
•
Filing: 1920-09-24
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Granted: 1923-03-13
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Expires: 1940-09-24
Abstract
No abstract record available.
Inventors
- 👤 Albert L Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:07
CPC Classifications
F; F22; F22B; F22B35/00
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) | 1926-03-12 | 1926-09-11 | 1927-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-03-12 | 1930-09-11 | 1931-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-03-12 | 1934-09-11 | 1935-03-13 | $7700.00 | Window Closed / Lapsed |