Patent US2846479A successfully refreshed from Google Patents.
US2846479A
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Purification of non-converted material in the catalytic cracking of diarylalkanes
Assignee: Wyeth Holdings LLC
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Filing: 1956-07-25
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Granted: 1958-08-05
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Expires: 1976-07-25
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Saunders
- 👤 Edwin M Smolin
- 👤 James E Longfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:30
CPC Classifications
C; C07; C07C; C07C25/00; C07C25/24; C07C25/28; C07C15/00; C07C15/40; C07C15/42; C07C15/44; C07C15/46; C07C17/00; C07C17/361
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
IN THE METHOD OF CATALYSTICALLY CRACKING UNSYMMETRICAL DIARYLALKANES HAVING AT LEAST TWO CARBON ATOMS AND HAVING THE TWO ARYL SUBSTITUENTS ATTACHED TO ONE OF SAID CARBON ATOMS TO PRODUCE RING-SUBSTITUTED POLYMERIZABLE COMPOUNDS WHEREIN THE SUBSTITUENT IS SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL RADICALS HAVING 1-4 CARBON ATOMS AND HALOGEN ATOMS, THE STEP COMPRISING HYDROGENATING THE NON-CONVERTED MATERIAL FROM THE CRACKING REACTION CONTAINING UNSATURATED ARYL COMPOUND AND OTHER IMPURITIES AND THEREAFTER CATALYTICALLY CRACKING SAID HYDROGENATED MATERIAL.
Claim 2
Dependent Claim
77 words
IN THE METHOD OF CATALYSTICALLY CRACKING UNSYMMETRICAL DIARYLALKANES HAVING AT LEAST TWO CARBON ATOMS AND HAVING THE TWO ARYL SUBSTITUENTS ATTACHED TO ONE OF SAID CARBON ATOMS TO PRODUCE RING-SUBSTITUTED POLYMERIZABLE COMPOUNDS WHEREIN THE SUBSTITUENT IS SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL RADICALS HAVING 1-4 CARBON ATOMS AND HALOGEN ATOMS, THE STEP COMPRISING HYDROGENATING THE NON-CONVERTED MATERIAL FROM THE CRACKING REACTION CONTAINING UNSATURATED ARYL COMPOUND AND OTHER IMPURITIES AND THEREAFTER CATALYTICALLY CRACKING SAID HYDROGENATED MATERIAL.
References Cited (Backward Citations)
US2106013A
Cited
US2422166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |