Patent US1888332A successfully refreshed from Google Patents.
US1888332A
Expired / Lapsed
US
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Pressure control system
Assignee: Individual
•
Filing: 1928-09-21
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Granted: 1932-11-22
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Expires: 1948-09-21
Abstract
No abstract record available.
Inventors
- 👤 David L Summey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:19
CPC Classifications
B; B21; B21C; B21C35/00; B21C35/02; B21C47/00; B21C47/02; B21C47/10; B21C47/14; Y; Y10; Y10S; Y10S414/00; Y10S414/122; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86622
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) | 1935-11-22 | 1936-05-23 | 1936-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-11-22 | 1940-05-23 | 1940-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-11-22 | 1944-05-23 | 1944-11-22 | $7700.00 | Window Closed / Lapsed |