Patent US3140243A successfully refreshed from Google Patents.
US3140243A
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US
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Assignee: Halcon Research and Development Corp
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Filing: —
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Granted: 1964-07-07
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Expires: 1981-07-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:20
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/70; C07C37/74; C07C37/685; C07C37/84; C07C39/00; C07C39/02; C07C39/04; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR THE PRODUCTION OF PHENOL FROM CRUDE PHENOL WHICH CONTAINS NOT MORE THAN 10% BY WEIGHT OF AN OXYGENATED CYCLOHEXANE IMPURITY WHICH COMPRISES FRACTIONALLY DISTILLING THE CRUDE PHENOL AND SEPARATING A FIRST FRACTION CONTAINING PHENOL AND MATERIAL BOILING LOWER THAN PHENOL FROM A SECOND FRACTION BOILING HIGHER THAN PHENOL, FRACTIONALLY DISTILLING SAID FIRST FRACTION IN A SECOND SEPARATE FRACTIONAL DISTILLATION AND SEPARATING PURE PHENOL AS HIGHER BOILING PRODUCT FROM SAID SECOND DISTILLATION, BOTH FRACTIONAL DISTILLATIONS BEING CARRIED OUT AT SUBSTANTIALLY ATMOSPHERIC PRESSURE IN THE ABSENCE OF ADDED AGENTS.
Claim 2
Dependent Claim
90 words
A PROCESS FOR THE PRODUCTION OF PHENOL FROM CRUDE PHENOL WHICH CONTAINS NOT MORE THAN 10% BY WEIGHT OF AN OXYGENATED CYCLOHEXANE IMPURITY WHICH COMPRISES FRACTIONALLY DISTILLING THE CRUDE PHENOL AND SEPARATING A FIRST FRACTION CONTAINING PHENOL AND MATERIAL BOILING LOWER THAN PHENOL FROM A SECOND FRACTION BOILING HIGHER THAN PHENOL, FRACTIONALLY DISTILLING SAID FIRST FRACTION IN A SECOND SEPARATE FRACTIONAL DISTILLATION AND SEPARATING PURE PHENOL AS HIGHER BOILING PRODUCT FROM SAID SECOND DISTILLATION, BOTH FRACTIONAL DISTILLATIONS BEING CARRIED OUT AT SUBSTANTIALLY ATMOSPHERIC PRESSURE IN THE ABSENCE OF ADDED AGENTS.
References Cited (Backward Citations)
US2728795A
Cited
US2824048A
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US2115401A
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US2265939A
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US2486342A
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US2762760A
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US2679535A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |