US2697028A
Expired / Lapsed
US
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Methods of producing dehydrogenated hydrocarbon bodies
Assignee: AT&T Inc
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Filing: 1951-04-28
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Granted: 1954-12-14
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Expires: 1971-04-28
Abstract
No abstract record available.
Inventors
- 👤 William O Baker
- 👤 Richard O Grisdale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:55
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; C; C01; C01B; C01B32/00; H01B1/04; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE METHOD WHICH COMPRISES SUBJECTING TO ADDITION POLYMERIZATION A POLYMERIZABLE HYDROARBON MATERIALHAVING AN AVERAGE FUNCTIONALITY IN ADDITION POLYMERIZATION OF AT LEAST 2.4 AND CONTAINING AT LEAST 20 PER CENT BY WEIGHT OF DIVINYL BENZENE, HEATING THE RESULTING POLYMER IN AIR AT A TEMPERATURE BETWEEN 200* C. AND 300* C. FOR AT LEAST TWO HOURS AND HEATING THE RESULTING MATERIAL AT AT TEMPERATURE OF AT LEAST 400* C. IN A NONOXIDIZING ATMOSPHERE.
Claim 2
Independent Claim
71 words
THE METHOD WHICH COMPRISES SUBJECTING TO ADDITION POLYMERIZATION A POLYMERIZABLE HYDROARBON MATERIALHAVING AN AVERAGE FUNCTIONALITY IN ADDITION POLYMERIZATION OF AT LEAST 2.4 AND CONTAINING AT LEAST 20 PER CENT BY WEIGHT OF DIVINYL BENZENE, HEATING THE RESULTING POLYMER IN AIR AT A TEMPERATURE BETWEEN 200* C. AND 300* C. FOR AT LEAST TWO HOURS AND HEATING THE RESULTING MATERIAL AT AT TEMPERATURE OF AT LEAST 400* C. IN A NONOXIDIZING ATMOSPHERE.
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) | 1957-12-13 | 1958-06-14 | 1958-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-13 | 1962-06-14 | 1962-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-13 | 1966-06-14 | 1966-12-14 | $7700.00 | Window Closed / Lapsed |