Patent US3209042A successfully refreshed from Google Patents.
US3209042A
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US
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Treatment of polyphenyls
Assignee: Individual
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Filing: 1962-10-29
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Granted: 1965-09-28
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Expires: 1982-10-29
Abstract
No abstract record available.
Inventors
- 👤 Daniel A Scola
- 👤 Robert J Wineman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:49
CPC Classifications
G; G21; G21C; G21C19/00; G21C19/28; G21C19/30; G21C19/307; C; C07; C07C; C07C4/00; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/16; C07C2523/24; C07C2523/26; C07C2523/28; C07C2523/38; C07C2523/40; C07C2523/42; C07C2523/44; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10S; Y10S376/00; Y10S376/90; Y10S376/904; Y10S376/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
THE METHOD WHICH COMPRISES CONTACTING A MIXTURE OF POLYPHENYLS HAVING AN AVERAGE MOLECULAR WEIGHT OF ABOUT 400 TO ABOUT 500 AND A BROOKFIELD VISCOSITY AT 265*C. OF ABOUT 3 TO ABOUT 10 CP., WITH HYDROGEN IN THE PRESENCE OF A CATALYST SELECTED FROM THE CLASS CONSISTING OF (A) A METAL OR METAL OXIDE OF GROUPS I, VI AND VIII OF THE PERIODIC ARRANGEMENT OF ELEMENTS DEPOSITED ON ALUMINA AND (B) COPPER CHROMITE, AT A TEMPERATURE OF ABOUT 300*C. TO ABOUT 600*C. AND A PRESSURE OF 200 TO 1800 $P.S.I.G., TO OBTAIN A PRODUCT HAVING A LOWER AVERAGE MOLECULAR WEIGHT AND A LOWER VISCOSITY THAN THAT OF SAID MIXTURE OF POLYPHENYLS.
Claim 2
Independent Claim
110 words
THE METHOD WHICH COMPRISES CONTACTING A MIXTURE OF POLYPHENYLS HAVING AN AVERAGE MOLECULAR WEIGHT OF ABOUT 400 TO ABOUT 500 AND A BROOKFIELD VISCOSITY AT 265*C. OF ABOUT 3 TO ABOUT 10 CP., WITH HYDROGEN IN THE PRESENCE OF A CATALYST SELECTED FROM THE CLASS CONSISTING OF (A) A METAL OR METAL OXIDE OF GROUPS I, VI AND VIII OF THE PERIODIC ARRANGEMENT OF ELEMENTS DEPOSITED ON ALUMINA AND (B) COPPER CHROMITE, AT A TEMPERATURE OF ABOUT 300*C. TO ABOUT 600*C. AND A PRESSURE OF 200 TO 1800 $P.S.I.G., TO OBTAIN A PRODUCT HAVING A LOWER AVERAGE MOLECULAR WEIGHT AND A LOWER VISCOSITY THAN THAT OF SAID MIXTURE OF POLYPHENYLS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |