US2647152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terpenylalkylphenols and their preparation
Assignee: Bridgestone Firestone Inc
•
Filing: 1950-07-12
•
Granted: 1953-07-28
•
Expires: 1970-07-12
Abstract
No abstract record available.
Inventors
- 👤 Leland J Kitchen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:50
CPC Classifications
C; C07; C07C; C07C39/00; C07C39/12; C07C39/17; C07C2602/00; C07C2602/36; C07C2602/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US1469709A
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GB204754A
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DE598298C
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US2123898A
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US2186132A
Cited
US2145369A
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US2343845A
Cited
US2471454A
Cited
US2537636A
Cited
US2537647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |