US2642323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston ring
Assignee: Perfect Circle Corp
•
Filing: 1949-12-29
•
Granted: 1953-06-16
•
Expires: 1969-12-29
Abstract
No abstract record available.
Inventors
- 👤 Denny D Duesenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:18
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/14; F16J9/145; F16J9/06; F16J9/20; F16J9/203
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1348641A
Cited
GB412695A
Cited
FR863465A
Cited
US2426385A
Cited
US2334243A
Cited
US2280745A
Cited
US2364743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |