Patent US3830850A successfully refreshed from Google Patents.
US3830850A
Expired / Lapsed
US
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Ethoxylated condensation product of a phenol and formaldehyde
Assignee: Phillips Petroleum Co
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Filing: 1970-07-17
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Granted: 1974-08-20
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Expires: 1990-07-17
Abstract
Abstract A METHOD IS PROVIDED FOR PREPARING AN ADDITIVE AGENT COMPRISING AN ETHOXYLATED CONDENSATION PRODUCT OF A PHENOL AND FORMALDEHYDE. SAID ADDITIVE IS PREFERABLY PREPARED BY REACTING A PHENOL AND A MONAQUEOUS FORMALDEHYDE TO PREPATE A POLYEYCLIC HYDROPHOBE WHICH IS THEN REACTED WITH ETHYLENE OXIDE.
Inventors
- 👤 C Stratton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:11
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/10; C08G8/28; C08G8/36; C09; C09K; C09K23/00; C09K23/42; C09K8/00; C09K8/58; C09K8/584
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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |