US2595852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for spray drying soluble fusible polymers of unsaturated esters
Assignee: Shell Development Co
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Filing: 1949-06-20
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Granted: 1952-05-06
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Expires: 1969-06-20
Abstract
No abstract record available.
Inventors
- 👤 Francis C Hopper
- 👤 Quentin T Wiles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:34
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/06; C08F6/12; Y; Y10; Y10S; Y10S159/00; Y10S159/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
133 words
A PROCESS FOR CONVERTING A FUSIBLE, SOLUBLE POLYMER OF AN ESTER OF AN UNSATURATED ALCOHOL POSSESSING AT LEAST ONE ETHYLENIC LINKAGE NOT MORE THAN FOUR CARBON ATOMS REMOVED FROM THE HYDROXYL GROUP AND A POLYCARBOXYLIC ACID WHEREIN AT LEAST TWO OF THE CARBOXYL GROUPS ARE ESTERIFIED WITH THE AFOREESCRIBED UNSTATURATED ALCOHOL INTO RELATIVELY DRY FINELY DIVIDED PARTICLES WHICH ARE SUBSTANTIALLY SOLUBLE AND FUSIBLE, WHICH COMPRISES PROJECTING A SOLUTION COMPRISING A MIXTURE OF THE SAID FUSIBLE, SOLUBLE POLYMER AND THE MONOMERIC ESTER EMPLOYED IN THE PREPARATION OF THE SAID POLYMER WHICH SOLUTION CONTAINS AT LEAST 90% BY WEIGHT OF THE POLYMER AND WHICH HAS BEEN DILUTED WITH A VOLATILE ORGANIC SOLVENT TO FORM INTO SPRAYABLE SOLUTION, IN FINELY DIVIDE FROM INTO RELATIVLEY DRY GAS HEATED TO A TEMPERATURE BETWEEN 50* C. AND 240* C.
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) | 1955-05-06 | 1955-11-05 | 1956-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-06 | 1959-11-05 | 1960-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-06 | 1963-11-05 | 1964-05-06 | $7700.00 | Window Closed / Lapsed |