Patent US2807629A successfully refreshed from Google Patents.
US2807629A
Expired / Lapsed
US
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Catalytic dehydrogenation of dialkylene glycols
Assignee: Jefferson Chemical Co Inc
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Filing: 1953-10-23
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Granted: 1957-09-24
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Expires: 1973-10-23
Abstract
No abstract record available.
Inventors
- 👤 Jr John Barr Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:14
CPC Classifications
C; C07; C07D; C07D319/00; C07D319/10; C07D319/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
IN THE CATALYTIC DEHYDROGENATION OF DIALKYLENE GLYCOLS HAVING THE FORMULA
Claim 2
Dependent Claim
10 words
IN THE CATALYTIC DEHYDROGENATION OF DIALKYLENE GLYCOLS HAVING THE FORMULA
References Cited (Backward Citations)
US2142033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |