US2808440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing 5-hydroxyvaleraldehyde
Assignee: Eastman Kodak Co
•
Filing: 1955-09-08
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Granted: 1957-10-01
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Expires: 1975-09-08
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Dickey
- 👤 Frederick B Joyner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:12
CPC Classifications
C; C07; C07C; C07C47/00; C07C47/02; C07C47/19; C07C45/00; C07C45/56; C07C45/57; C07C45/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A PROCESS OF MANUFACTURING 5-HYDRIXYVALERALDEHYDE WHICH COMPRISES HYDROLYZING 2,3-DIHYDROPYRAN IN THE PRESENCE OF THE ACIDIC FORM OF AN ION-EXCHANGE RESIN OF THE SULFONATED TYPE AS A HYDROLSIS CATALYST.
Claim 2
Dependent Claim
28 words
A PROCESS OF MANUFACTURING 5-HYDRIXYVALERALDEHYDE WHICH COMPRISES HYDROLYZING 2,3-DIHYDROPYRAN IN THE PRESENCE OF THE ACIDIC FORM OF AN ION-EXCHANGE RESIN OF THE SULFONATED TYPE AS A HYDROLSIS CATALYST.
References Cited (Backward Citations)
US2572941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |