US2554973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified partially hydrolyzed polymeric products of the condensation of unsaturated aldehydes and esters of the same
Assignee: Shell Development Co
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Filing: 1946-08-02
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Granted: 1951-05-29
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Expires: 1966-08-02
Abstract
No abstract record available.
Inventors
- 👤 Seaver A Ballard
- 👤 Richard R Whetstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:46
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/14; C08G2/18; C08G2/30; C08G2/32; C08G6/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A MODIFIED PARTIALLY HYDROLYZED POLYMERIC PRODUCT OF THE CONDENSATION OF AN UNSATURATED ALDEHYDE UNDER SUBSTANTIALLY NON-AQUEOUS CONDITIONS BY THE ACTION OF HEAT ALONE AT A TEMPERATURE OF FROM ABOUT 125* C. TO ABOUT 275* C., PARTIALLY HYDROLYZED TO RENDER THE WATER-INSOLUBLE CONDENSATION PRODUCT THUS OBTAINED AT LEAST ABOUT 50 PER CENT SOLUBLE IN FOUR PARTS BY WEIGHT OF WATER PER PART OF TOTAL POLYMERIC PRODUCT, WITHOUT SUBSTANTIAL DEGRADATION OF THE POLYMER INTO UNITS OF LOWER MOLECULAR WEIGHT, MODIFIED TO PRODUCE THEREIN ONE OF THE ESTERIFIABLE GROUPS OF THE CLASS CONSISTING OF THE HYDROXYL GROUP AND THE CARBOXYL GROUP.
Claim 2
Dependent Claim
98 words
A MODIFIED PARTIALLY HYDROLYZED POLYMERIC PRODUCT OF THE CONDENSATION OF AN UNSATURATED ALDEHYDE UNDER SUBSTANTIALLY NON-AQUEOUS CONDITIONS BY THE ACTION OF HEAT ALONE AT A TEMPERATURE OF FROM ABOUT 125* C. TO ABOUT 275* C., PARTIALLY HYDROLYZED TO RENDER THE WATER-INSOLUBLE CONDENSATION PRODUCT THUS OBTAINED AT LEAST ABOUT 50 PER CENT SOLUBLE IN FOUR PARTS BY WEIGHT OF WATER PER PART OF TOTAL POLYMERIC PRODUCT, WITHOUT SUBSTANTIAL DEGRADATION OF THE POLYMER INTO UNITS OF LOWER MOLECULAR WEIGHT, MODIFIED TO PRODUCE THEREIN ONE OF THE ESTERIFIABLE GROUPS OF THE CLASS CONSISTING OF THE HYDROXYL GROUP AND THE CARBOXYL GROUP.
References Cited (Backward Citations)
US1984417A
Cited
US2097493A
Cited
US2035314A
Cited
US2212900A
Cited
GB515894A
Cited
US2345138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |