US2768973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of glycolaldehyde by hydrolysis of 4-chloro-2-oxodioxolane
Assignee: EIDP Inc
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Filing: 1954-11-30
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Granted: 1956-10-30
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Expires: 1974-11-30
Abstract
No abstract record available.
Inventors
- 👤 John E Castle
- 👤 Vincent J Webers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:32
CPC Classifications
C; C07; C07C; C07C47/00; C07C47/02; C07C47/19; C07C45/00; C07C45/56; C07C45/57; C07C45/59
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
IN A PROCESS FOR THE PREPARATION OF GLYCOLALDEHYDE THE STEP WHICH COMPRISES HYDROLYZING 4-CHLORO-2-OXODIOXOLANE WITH LIQUID WATER AT A PH OF AT LEAST ABOUT 3.
Claim 2
Dependent Claim
25 words
IN A PROCESS FOR THE PREPARATION OF GLYCOLALDEHYDE THE STEP WHICH COMPRISES HYDROLYZING 4-CHLORO-2-OXODIOXOLANE WITH LIQUID WATER AT A PH OF AT LEAST ABOUT 3.
References Cited (Backward Citations)
US2511942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |