US2819322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of aromatic compounds
Assignee: Shell Development Co
•
Filing: 1953-12-21
•
Granted: 1958-01-07
•
Expires: 1973-12-21
Abstract
No abstract record available.
Inventors
- 👤 Lloyd C Fetterly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:00
CPC Classifications
C; C07; C07C; C07C4/00; C07C2523/00; C07C2523/70; C07C2523/76; C07C2523/84; C07C2523/85; C07C2523/88; C07C2523/882; C07C2527/00; C07C2527/02; C07C2527/04; C07C2527/047; C07C2527/049
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A PROCESS FOR THE PREPARATION OF A POLYMETHYLBENZENE HAVING FROM THREE TO FIVE METHYL GROUPS WHICH COMPRISES HYDROCRACKING A DIARYLMETHANE IN WHICH EACH ARYL GROUP IS A METHYL SUBSTITUTED PHENYL GROUP HAVING FROM TWO TO FOUR METHYL GROUP SUBSTITUENTS AT AN ELEVATED TEMPERATURE AND A PRESSURE FROM ABOUT 100 TO ABOUT 600LBS./SQ. IN., GUAGE, IN THE PRESENCE OF FROM ABOUT ONE TO ABOUT TWENTY MOLES OF HYDROGEN PER MOLE OF DIARYLMETHANE AND A HIGH MELTING INORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF OXIDE, SULFIDE AND COMPOSITES THEREOF OF GROUP VI AND VIII METALS HAVING ATOMIC NUMBERS OF AT LEAST 24, AS CATALYST.
Claim 2
Dependent Claim
103 words
A PROCESS FOR THE PREPARATION OF A POLYMETHYLBENZENE HAVING FROM THREE TO FIVE METHYL GROUPS WHICH COMPRISES HYDROCRACKING A DIARYLMETHANE IN WHICH EACH ARYL GROUP IS A METHYL SUBSTITUTED PHENYL GROUP HAVING FROM TWO TO FOUR METHYL GROUP SUBSTITUENTS AT AN ELEVATED TEMPERATURE AND A PRESSURE FROM ABOUT 100 TO ABOUT 600LBS./SQ. IN., GUAGE, IN THE PRESENCE OF FROM ABOUT ONE TO ABOUT TWENTY MOLES OF HYDROGEN PER MOLE OF DIARYLMETHANE AND A HIGH MELTING INORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF OXIDE, SULFIDE AND COMPOSITES THEREOF OF GROUP VI AND VIII METALS HAVING ATOMIC NUMBERS OF AT LEAST 24, AS CATALYST.
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) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |