Patent US5889886A successfully refreshed from Google Patents.
US2772129A
Expired / Lapsed
US
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Piston packing ring
Assignee: FRISBY Corp
•
Filing: 1952-07-16
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Granted: 1956-11-27
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Expires: 1972-07-16
Abstract
No abstract record available.
Inventors
- 👤 Frank D Frisby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:05
CPC Classifications
F; F16; F16J; F16J9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1103912A
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US1357392A
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US2091947A
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US2068114A
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US2030927A
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US2111291A
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GB512360A
Cited
US2579697A
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US2609260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |