US2629752A
Expired / Lapsed
US
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Preparation and purification of 1-phenylbutadiene-1, 3
Assignee: GAF Chemicals Corp
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Filing: 1951-12-27
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Granted: 1953-02-24
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Expires: 1971-12-27
Abstract
No abstract record available.
Inventors
- 👤 Louis E Craig
- 👤 Clifford E Larrabee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:02
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/40; C07C15/42; C07C15/44; C07C2/00; C07C2/02; C07C2/42; C07C2/48; C07C7/00; C07C7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
IN THE PROCESS OF CATALYTICALLY CYCLOPOLYMERIZING ACETYLENE AND SEPARATING A YELLOW-COLORED C10H10 MATERIAL, THE IMPROVEMENT WHICH COMPRISES EXTRACTING THE YELLOW COMPONENT FROM SAID MATERIAL WITH AQUEOUS SILVER NITRATE, AND DISTILLING FROM THE RESULTING RAFFINATE 1-PHENYLBUTADIENE1,3.
Claim 2
Dependent Claim
35 words
IN THE PROCESS OF CATALYTICALLY CYCLOPOLYMERIZING ACETYLENE AND SEPARATING A YELLOW-COLORED C10H10 MATERIAL, THE IMPROVEMENT WHICH COMPRISES EXTRACTING THE YELLOW COMPONENT FROM SAID MATERIAL WITH AQUEOUS SILVER NITRATE, AND DISTILLING FROM THE RESULTING RAFFINATE 1-PHENYLBUTADIENE1,3.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-24 | 1956-08-25 | 1957-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-24 | 1960-08-25 | 1961-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-24 | 1964-08-25 | 1965-02-24 | $7700.00 | Window Closed / Lapsed |