US2739972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation products of dialdehydes with 1,2-alkylene oxides
Assignee: Distillers Co Yeast Ltd
•
Filing: 1952-03-17
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Granted: 1956-03-27
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Expires: 1972-03-17
Abstract
No abstract record available.
Inventors
- 👤 Abbott Leslie Stephen
- 👤 Faulkner Donald
- 👤 Hollis Charles Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:35
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A PROCESS FOR THE MANUFACTURE OF PLASTICISERS WHICH COMPRISES CONDENSING A DIALDEHYDE SELECTED FROM THE GROUP CONSISTING OF 1:3-CYCLOHEXANE DIALDEHYDE, 1:4CYCLOHEXANE DIALDEHYDE, 2-METHOXYMETHYL-2:4-DIMETHYLPENTANE-1:5-DIAL AND 2-ETHOXYMETHYL-2:4-DIMETHYLPENTANE-1:5-DIAL WITH A 1:2-ALKYLENE OXIDE, AND ISOLATING THE POLYACETAL FORMED.
Claim 2
Dependent Claim
34 words
A PROCESS FOR THE MANUFACTURE OF PLASTICISERS WHICH COMPRISES CONDENSING A DIALDEHYDE SELECTED FROM THE GROUP CONSISTING OF 1:3-CYCLOHEXANE DIALDEHYDE, 1:4CYCLOHEXANE DIALDEHYDE, 2-METHOXYMETHYL-2:4-DIMETHYLPENTANE-1:5-DIAL AND 2-ETHOXYMETHYL-2:4-DIMETHYLPENTANE-1:5-DIAL WITH A 1:2-ALKYLENE OXIDE, AND ISOLATING THE POLYACETAL FORMED.
References Cited (Backward Citations)
FR892443A
Cited
FR892444A
Cited
US2497303A
Cited
US2526702A
Cited
BE502245A
Cited
BE508059A
Cited
US2643236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |