Patent FR1287657A successfully refreshed from Google Patents.
US2976299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of 2, 3-dihydropyran
Assignee: Quaker Oats Co
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Filing: 1958-10-28
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Granted: 1961-03-21
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Expires: 1978-10-28
Abstract
No abstract record available.
Inventors
- 👤 Donald G Manly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:46
CPC Classifications
C; C07; C07D; C07D309/00; C07D309/16; C07D309/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
58 words
IN A PROCESS FOR PRODUCING 2,3-DIHYDROPYRAN IN WITH TETRAHYDROFURFURYL ALCOHOL IN THE VAPOR PHASE IS CONTACTED WITH A CATALYST AT A TEMPERATURE BETWEEN ABOUT 250*C. AND ABOUT 350*C., THE IMPROVEMENT COMPRISING EMPLOYING A CATALYST CONTAINING FROM ABOUT 85% TO ABOUT 95% BY WEIGHT OF TITANIUM DIOXIDE AND FROM ABOUT 15% TO ABOUT 5% BY WEIGHT OF ALUMINUM OXIDE.
References Cited (Backward Citations)
DE840844C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |