Patent US1451481A successfully refreshed from Google Patents.
US1451481A
Expired / Lapsed
US
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Pressure regulator
Assignee: Deming Co
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Filing: 1920-11-29
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Granted: 1923-04-10
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Expires: 1940-11-29
Abstract
No abstract record available.
Inventors
- 👤 Elbert S Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:39
CPC Classifications
E; E21; E21D; E21D15/00; E21D15/50; E21D15/51; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2622; Y10T137/8593; Y10T137/877; Y10T137/87829; Y10T137/87837; Y10T137/87845
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) | 1926-04-09 | 1926-10-09 | 1927-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-04-09 | 1930-10-09 | 1931-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-04-09 | 1934-10-09 | 1935-04-10 | $7700.00 | Window Closed / Lapsed |