Patent US3449455A successfully refreshed from Google Patents.
US3449455A
Expired / Lapsed
US
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Side chain alkylation
Assignee: Ethyl Corp
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Filing: 1967-10-10
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Granted: 1969-06-10
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Expires: 1987-10-10
Abstract
No abstract record available.
Inventors
- 👤 John P Napolitano
- 👤 Rex D Closson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:26
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/72; C07C2521/00; C07C2521/06; C07C2521/08; C07C2523/00; C07C2523/02; C07C2523/04; C07C2602/00; C07C2602/02; C07C2602/04; C07C2602/08; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/06; C07C2603/10; C07C2603/12; C07C2603/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2721886A
Cited
US2849508A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |