Patent US3483260A successfully refreshed from Google Patents.
US3483260A
Expired / Lapsed
US
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Tetrakis - hydroxybenzyl phosphonium halides and the preparation thereof
Assignee: Ethyl Corp
•
Filing: 1967-10-27
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Granted: 1969-12-09
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Expires: 1987-10-27
Abstract
No abstract record available.
Inventors
- 👤 Calvin J Worrel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:54
CPC Classifications
C; C11; C11B; C11B5/00; C11B5/0071; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/54; C07F9/5456; C08; C08K; C08K5/00; C08K5/49; C08K5/50; C09; C09K; C09K15/00; C09K15/04; C09K15/32; C09K15/322
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2862970A
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US2937207A
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US3230069A
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US2946824A
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US3146212A
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US3221057A
Cited
US3213057A
Cited
US3257460A
Cited
US3248429A
Cited
US3333005A
Cited
US3422149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-08 | 1973-06-09 | 1973-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-08 | 1977-06-09 | 1977-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-08 | 1981-06-09 | 1981-12-09 | $7700.00 | Window Closed / Lapsed |