US2861083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 2, 3-dihydropyran-2-yl 2-formyl-2, 3-dihydropyran-2-yl carbinol
Assignee: Union Carbide Corp
•
Filing: 1957-02-01
•
Granted: 1958-11-18
•
Expires: 1977-02-01
Abstract
No abstract record available.
Inventors
- 👤 Howard R Guest
- 👤 Ben W Kiff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:58
CPC Classifications
C; C07; C07D; C07D309/00; C07D309/16; C07D309/20; C07D309/22; C07D309/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
THE METHOD FOR THE ALDOLIZATION OF ACROLEIN DIMER WHICH COMPRISES SUBJECTING A MIXTURE OF 2,3-DIHYDRO-2FORMLY-1,4-PYRAN AND A COPPER CATALYST TO ELEVATED TEMPERATURES TO OBTAIN 2,3-DIHYDROPYRAN-2-YL 2-FORMYL-2,3-DI HYDROPYRAN-2-YL CARBINOL.
Claim 2
Independent Claim
28 words
THE METHOD FOR THE ALDOLIZATION OF ACROLEIN DIMER WHICH COMPRISES SUBJECTING A MIXTURE OF 2,3-DIHYDRO-2FORMLY-1,4-PYRAN AND A COPPER CATALYST TO ELEVATED TEMPERATURES TO OBTAIN 2,3-DIHYDROPYRAN-2-YL 2-FORMYL-2,3-DI HYDROPYRAN-2-YL CARBINOL.
References Cited (Backward Citations)
US2212894A
Cited
US2610193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |