Patent US2839558A successfully refreshed from Google Patents.
US2839558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxyalkylene compounds
Assignee: Visco Products Co
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Filing: 1954-09-14
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Granted: 1958-06-17
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Expires: 1974-09-14
Abstract
No abstract record available.
Inventors
- 👤 Willard H Kirkpatrick
- 👤 Walker Alice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:04
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/04; B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; B01D19/0409; C07F7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
AN ORGANIC ESTER OF A MEMBER FROM THE GROUP CONSISTING OF CARBOXYLIC ORGANIC ACIDS AND CARBOXYLIC ACID ANHYDRIDES AND A POLYOXYALKYLENE POLYOL OXYSILANE, THERE BEING 1 TO 6 CARBON ATOMS IN EACH OXYALKYLENE GROUP OF SAID ESTER AND UP TO 4 POLYOXYALKYLENE GROUPS ATTACHED TO EACH SILICON ATOM, ANY GROUP OTHER THAN OXYALKYLENE GROUPS ATTACHED TO SAID SILICON ATOM BEING FROM THE CLASS CONSISTING OF HYDROCARBYL AND HYDROCARBYLOXY GROUPS, AND THE RESULTANT COMPOUND BEING SOLUBLE IN SULFUR DIOXIDE EXTRACT, THE MAJOR PORTION OF THE MOLECULAR WEIGHT OF THE ESTERS BEING ATTRIBUTABLE TO OXYALKYLENE GROUPS FROM THE GROUP CONSISTING OF OXY-1,2-PROPYLENE GROUPS AND BOTH OXYETHYLENE AND OXY-1,2-PROPYLENE GROUPS IN A WEIGHT RATIO OF OXYETHYLENE TO OXY-1,2-PROPYLENE NOT EXCEEDING 4:1.
Claim 2
Dependent Claim
118 words
AN ORGANIC ESTER OF A MEMBER FROM THE GROUP CONSISTING OF CARBOXYLIC ORGANIC ACIDS AND CARBOXYLIC ACID ANHYDRIDES AND A POLYOXYALKYLENE POLYOL OXYSILANE, THERE BEING 1 TO 6 CARBON ATOMS IN EACH OXYALKYLENE GROUP OF SAID ESTER AND UP TO 4 POLYOXYALKYLENE GROUPS ATTACHED TO EACH SILICON ATOM, ANY GROUP OTHER THAN OXYALKYLENE GROUPS ATTACHED TO SAID SILICON ATOM BEING FROM THE CLASS CONSISTING OF HYDROCARBYL AND HYDROCARBYLOXY GROUPS, AND THE RESULTANT COMPOUND BEING SOLUBLE IN SULFUR DIOXIDE EXTRACT, THE MAJOR PORTION OF THE MOLECULAR WEIGHT OF THE ESTERS BEING ATTRIBUTABLE TO OXYALKYLENE GROUPS FROM THE GROUP CONSISTING OF OXY-1,2-PROPYLENE GROUPS AND BOTH OXYETHYLENE AND OXY-1,2-PROPYLENE GROUPS IN A WEIGHT RATIO OF OXYETHYLENE TO OXY-1,2-PROPYLENE NOT EXCEEDING 4:1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |