US2728620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure seals
Assignee: Wallace O Leonard Inc
•
Filing: 1952-05-06
•
Granted: 1955-12-27
•
Expires: 1972-05-06
Abstract
No abstract record available.
Inventors
- 👤 Rudolph E Krueger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:50
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/166; Y; Y10; Y10S; Y10S277/00; Y10S277/91; Y10S277/928
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2250011A
Cited
US2437814A
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US2427789A
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US2533531A
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US2520306A
Cited
US2494598A
Cited
US2456356A
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US2587091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |