Patent US3963754A successfully refreshed from Google Patents.
US3963754A
Expired / Lapsed
US
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2-Vinyl-5-methyl-1,3-dioxane
Assignee: EIDP Inc
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Filing: 1974-07-31
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Granted: 1976-06-15
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Expires: 1994-07-31
Abstract
Abstract 2-Vinyl-5-methyl-1,3-dioxane is provided as a new cyclic acetal which, when hydroformylated, hydrolyzed and hydrogenated provides high yields of a mixture of 1,4-butanediol and 2-methyl-1,3-propanediol.
Inventors
- 👤 Charles C. Cumbo
- 👤 Kamlesh K. Bhatia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:48
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/132; C07C29/136; C07C29/14; C07C29/141
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
2-vinyl-5-methyl-1,3-dioxane.
Claim 2
Dependent Claim
1 words
2-vinyl-5-methyl-1,3-dioxane.
References Cited (Backward Citations)
US2729650A
Cited
US3208993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |