Patent US2926683A successfully refreshed from Google Patents.
US2926683A
Expired / Lapsed
US
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Fluid pressure control device
Assignee: MSA Safety Inc
•
Filing: 1955-04-14
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Granted: 1960-03-01
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Expires: 1975-04-14
Abstract
No abstract record available.
Inventors
- 👤 Frederick N Windsor
- 👤 Daniel A Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:55
CPC Classifications
A; A62; A62B; A62B9/00; A62B9/02; Y; Y10; Y10S; Y10S137/00; Y10S137/908; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7783; Y10T137/7793; Y10T137/7801; Y10T137/7835; Y10T137/7836
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |