US2617827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis-1,4-dialkylamino-1,3-butadienes
Assignee: Rohm and Haas Co
•
Filing: 1950-05-11
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Granted: 1952-11-11
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Expires: 1970-05-11
Abstract
No abstract record available.
Inventors
- 👤 Charles H Mckeever
- 👤 Joseph W Nemec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:26
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A PROCESS FOR PREPARING BIS(1,4-DIALKYLAMINO)-1,3-BUTADIENES IN WHICH THE ALKYL GROUPS CONTAIN NOT OVER TWO CARBON ATOMS EACH WHICH COMPRISES PASSING THE VAPORS OF A BIS(1,4-DIALKYLAMINO)-2-BUTYNE, IN WHICH THE ALKYL GROUPS CONTAIN NOT OVER TWO CARBON ATOMS EACH OVER A CATALYST HAVING CHROMIA AS THE ESSENTIAL ACTIVE AGENT AT 300*-450* C.
Claim 2
Dependent Claim
50 words
A PROCESS FOR PREPARING BIS(1,4-DIALKYLAMINO)-1,3-BUTADIENES IN WHICH THE ALKYL GROUPS CONTAIN NOT OVER TWO CARBON ATOMS EACH WHICH COMPRISES PASSING THE VAPORS OF A BIS(1,4-DIALKYLAMINO)-2-BUTYNE, IN WHICH THE ALKYL GROUPS CONTAIN NOT OVER TWO CARBON ATOMS EACH OVER A CATALYST HAVING CHROMIA AS THE ESSENTIAL ACTIVE AGENT AT 300*-450* C.
References Cited (Backward Citations)
GB619206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |