Patent US3247274A successfully refreshed from Google Patents.
US3247274A
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Preparation of di-para-xylylenes
Assignee: Union Carbide Corp
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Filing: 1964-07-09
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Granted: 1966-04-19
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Expires: 1984-07-09
Abstract
No abstract record available.
Inventors
- 👤 Dale F Pollart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:38
CPC Classifications
C; C07; C07C; C07C2/00; C07C2603/00; C07C2603/92; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/942
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
PROCESS FOR THE PREPAARATION OF CYCLIC DI-P-XYLYLENE SUBSTANTIALLY FREE OF POLY-P-XYLYLENE WHICH COMPRISES PYROLYZING 1,2-DI-P-TOLYLETHANE AT A TEMPERATURE BETWEEN ABOUT 800*C. AND 1000*C. TO GENERATE THE REACTIVE PXYLYLENE DIRADICAL
Claim 2
Dependent Claim
29 words
PROCESS FOR THE PREPAARATION OF CYCLIC DI-P-XYLYLENE SUBSTANTIALLY FREE OF POLY-P-XYLYLENE WHICH COMPRISES PYROLYZING 1,2-DI-P-TOLYLETHANE AT A TEMPERATURE BETWEEN ABOUT 800*C. AND 1000*C. TO GENERATE THE REACTIVE PXYLYLENE DIRADICAL
References Cited (Backward Citations)
US2878260A
Cited
US3149175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |