US3145167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removing phenols from aqueous media
Assignee: Dow Chemical Co
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Filing: 1961-07-03
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Granted: 1964-08-18
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Expires: 1981-07-03
Abstract
No abstract record available.
Inventors
- 👤 Max E Elder
- 👤 William F Tousignant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:39
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/683; C02F2101/00; C02F2101/30; C02F2101/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
PROCESS FOR REMOVING A PHENOL FROM AN AQUEOUS SOLUTION THEREOF BY CONTACTING SAID SOLUTION WITH A PARTICULATE RESINOUS COPOLYMER OF 0.9 TO 4 MOLE PERCENT OF A CROSSLINKING AGENT HAVING TWO NON-CONJUGATED VINYLIDENE GROUPS AND A BALANCE OF AR-VINYBENZYL MOIETIES HAVING ATTACHED AT THEIR BENZYLIC CARBON ATOMS SUBSTITUENT GROUPS OF THE FORMULA:
Claim 2
Dependent Claim
52 words
PROCESS FOR REMOVING A PHENOL FROM AN AQUEOUS SOLUTION THEREOF BY CONTACTING SAID SOLUTION WITH A PARTICULATE RESINOUS COPOLYMER OF 0.9 TO 4 MOLE PERCENT OF A CROSSLINKING AGENT HAVING TWO NON-CONJUGATED VINYLIDENE GROUPS AND A BALANCE OF AR-VINYBENZYL MOIETIES HAVING ATTACHED AT THEIR BENZYLIC CARBON ATOMS SUBSTITUENT GROUPS OF THE FORMULA:
References Cited (Backward Citations)
US2808375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |