Patent US2557696A successfully refreshed from Google Patents.
Patent US2725252A successfully refreshed from Google Patents.
US2725252A
Expired / Lapsed
US
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Securing means for a closure plug for a pressure vessel
Assignee: Greer Hydraulics Inc
•
Filing: 1951-06-04
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Granted: 1955-11-29
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Expires: 1971-06-04
Abstract
No abstract record available.
Inventors
- 👤 Edward M Greer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:28
CPC Classifications
F; F16; F16J; F16J13/00; F16J13/02; F16J13/10; Y; Y10; Y10T; Y10T292/00; Y10T292/20; Y10T292/205; Y10T292/212
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |