US3775475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telomer products
Assignee: Shell USA Inc
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Filing: 1971-04-28
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Granted: 1973-11-27
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Expires: 1991-04-28
Abstract
Abstract NOVEL LINEAR TELOMERS OF C4 ETHYLENICALLY UNSATURATED DICARBOXYLIC ACIDS OR DERIVATIVES THEREOF ARE PRODUCED BY TELOMERIZING A C4 ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID OR DERIVATIVE THEREOF WITH CERTAIN ALKYL ESTER OF ALKYLENE CARBONATE REACTANT IN THE PRESENCE OF A FREERADICAL CATALYST. THE TELOMERS ARE CONVERTED BY SAPONIFICATION WITH ALKAKI METAL OR AMMONIUM HYDROXIDE SOLUTIONS TO SUBSTANTIALLY BIODEGRADABLE, WATER-SOLUBLE POLYCARBOXYLATE SALTS TERMINATED WITH AN HYDROXY-SUBSTITUTED ALKYL END GROUP. THE COMPOUNDS ARE USED AS DETERGENT BUILDERS.
Inventors
- 👤 R Holm
- 👤 R Morris
- 👤 J Hayden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:17
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757; C07; C07C; C07C51/00; C07C51/347; C07C51/353; C07C59/00; C07C59/235; C07C59/347; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/32; C07D317/34; C07D317/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |