Patent US2468493A successfully refreshed from Google Patents.
US2468493A
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Assignee: Arrowhead Rubber Co
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Filing: 1945-07-16
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Granted: 1949-04-26
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Expires: 1965-07-16
Abstract
No abstract record available.
Inventors
- 👤 Fred A Greenwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:30
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1237031A
Cited
US1628832A
Cited
US2076456A
Cited
US2225026A
Cited
US2360109A
Cited
GB548458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-25 | 1952-10-25 | 1953-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-25 | 1956-10-25 | 1957-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-25 | 1960-10-25 | 1961-04-26 | $7700.00 | Window Closed / Lapsed |