Patent US3069470A successfully refreshed from Google Patents.
US3069470A
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Separation of toluidine isomers
Assignee: Union Oil Company of California
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Filing: 1958-07-21
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Granted: 1962-12-18
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Expires: 1978-07-21
Abstract
No abstract record available.
Inventors
- 👤 Raymond N Fleck
- 👤 Carlyle G Wight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:23
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/68; C07C211/00; C07C211/43; C07C211/44; C07C211/49; C07C211/50; C07C7/00; C07C7/12; C07C7/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR SEPARATING A MORE READILY ADSORBED TOLUIDINE ISOMER FROM A MIXTURE CONSISTINF ESSENTIALLY OF TOLUIDINE ISOMERS WHICH COMPRISES: (1) CONTACTING SAID MIXTURE WITH A LEAN GRANULAR ADSORBENT CONSISTING ESSENTIALLY OF A PARTIALLY DEHYDRATED CRYSTALLINE TYPE X MELLO ALUMINO SILICATE HAVING PORES OF SUBSTANTIALLY UNIFORM DIAMETER BETWEEN ABOUT 7 A. AND ABOUT 12 A. WHEREBY THERE IS OBTAINED A RICH ADSORBENT CONTAINING THE MORE READILY ADSORBED TOLUIDINE ISOMER IN GREATER CONCENTRATION THAN IN SAID MIXTURE AND AN UNADSORBED RAFFINATE PRODUCT; (2) SEPARATING SAID RAFFINATE PRODUCT FROM SAID RICH ADSORBENT; AND (3) TREATING SAID RICH ADSORBENT TO RECOVER THE MORE READILY ADSORBENT TOLUIDINE ISOMER THEREFORM.
Claim 2
Dependent Claim
105 words
A PROCESS FOR SEPARATING A MORE READILY ADSORBED TOLUIDINE ISOMER FROM A MIXTURE CONSISTINF ESSENTIALLY OF TOLUIDINE ISOMERS WHICH COMPRISES: (1) CONTACTING SAID MIXTURE WITH A LEAN GRANULAR ADSORBENT CONSISTING ESSENTIALLY OF A PARTIALLY DEHYDRATED CRYSTALLINE TYPE X MELLO ALUMINO SILICATE HAVING PORES OF SUBSTANTIALLY UNIFORM DIAMETER BETWEEN ABOUT 7 A. AND ABOUT 12 A. WHEREBY THERE IS OBTAINED A RICH ADSORBENT CONTAINING THE MORE READILY ADSORBED TOLUIDINE ISOMER IN GREATER CONCENTRATION THAN IN SAID MIXTURE AND AN UNADSORBED RAFFINATE PRODUCT; (2) SEPARATING SAID RAFFINATE PRODUCT FROM SAID RICH ADSORBENT; AND (3) TREATING SAID RICH ADSORBENT TO RECOVER THE MORE READILY ADSORBENT TOLUIDINE ISOMER THEREFORM.
References Cited (Backward Citations)
US2306610A
Cited
GB777233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |