US3053909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatically unsaturated organic compounds and preparation thereof
Assignee: 3M Co
•
Filing: 1956-02-10
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Granted: 1962-09-11
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Expires: 1976-02-10
Abstract
No abstract record available.
Inventors
- 👤 Horace R Davis
- 👤 Louis A Errede
- 👤 Billy F Landrum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:20
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/025; C07; C07C; C07C17/00; C07C17/013; C07C17/02; C07C17/07; C07C17/08; C07C17/35; C07C17/357; C07C255/00; C07C331/00; C07C331/02; C07C331/04; C07C5/00; C07C5/32; C07C5/373; C07C2601/00; C07C2601/12; C07C2601/16; C07C2602/00; C07C2602/02; C07C2602/04; C07C2602/10; C08G2261/00; C08G2261/30; C08G2261/34; C08G2261/342; C08G2261/3424
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A PROCESS WHICH COMPRISES PYROLYZING P-XYLENE AT A TEMPERATURE BETWEEN ABOUT 700*C. AND ABOUT 1300*C. AT A TOTAL PRESSURE NOT HIGHER THAN ABOUT 400 MM. MERCURY AND FOR A PERIOD OF NOT MORE THAN ABOUT ONE SECOND, AND FOR A PERIOD OF NOT MORE THAN ABOUT ONE SECOND, TO A TEMPERATURE BELOW ABOUT -45*C. TO PRODUCE A SOLUTION OF P-QUINODIMETHANE, AND REACTING SAID P-QUIODIMETHAN SOLUTION WITH AT LEASTA AN EQUIMOLAR AMOUNT OF AN INORGANIC COREACTANT SELECTED FROM THE GROUP CONSISTING OF THE HALOGENS, PSEUDO-HALOGENS, AND INORGANIC ACIDS TO PRODUCE AN ADDITION PRODUCT OF SAID P-QUINODIMETHANE AND INORGANIC COMPOUD.
Claim 2
Dependent Claim
98 words
A PROCESS WHICH COMPRISES PYROLYZING P-XYLENE AT A TEMPERATURE BETWEEN ABOUT 700*C. AND ABOUT 1300*C. AT A TOTAL PRESSURE NOT HIGHER THAN ABOUT 400 MM. MERCURY AND FOR A PERIOD OF NOT MORE THAN ABOUT ONE SECOND, AND FOR A PERIOD OF NOT MORE THAN ABOUT ONE SECOND, TO A TEMPERATURE BELOW ABOUT -45*C. TO PRODUCE A SOLUTION OF P-QUINODIMETHANE, AND REACTING SAID P-QUIODIMETHAN SOLUTION WITH AT LEASTA AN EQUIMOLAR AMOUNT OF AN INORGANIC COREACTANT SELECTED FROM THE GROUP CONSISTING OF THE HALOGENS, PSEUDO-HALOGENS, AND INORGANIC ACIDS TO PRODUCE AN ADDITION PRODUCT OF SAID P-QUINODIMETHANE AND INORGANIC COMPOUD.
References Cited (Backward Citations)
US2756239A
Cited
US2777005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |