US3117941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of expanda-
Assignee: —
•
Filing: —
•
Granted: 1964-01-14
•
Expires: 1981-01-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:17
CPC Classifications
C; C09; C09B; C09B59/00; C08; C08J; C08J9/00; C08J9/16; C08J9/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A PROCESS FOR THE PRODUCTION OF EXPANDABLE GRANULAR MATERIALS FROM SYNTHETIC FILM-FORMING THERMOPLASTIC SUBSTANCES WHICH COMPRISES INTERMINGLING (A) WATER CONTAINING A SMALL AMOUNT OF A DISPERSING AGENT FOR ORGANIC LIQUIDS WHICH ARE IMMISCIBLE WITH WATER WITH (B) A 5 TO 50% SOLUTION OF A SYNTHETIC THERMOPLASTIC FILM-FORMING SUBSTANCE IN AN ORGANIC SOLVENT WHICH IS WATER IMMISCIBLE AND HAS A BOILING POINT BETWEEN 30* AND 90*C. AND WHICH SOLUTION ALSO CONTAINS DISSOLVED THEREIN 2 TO 40% BY WEIGHT WITH REFERENCE TO THE ORGANIC SOLVENT OF A WATER-INSOLUBLE EXANDING AGENT, KEEPING THE INTERMINGLED LIQUIDS (A) AND (B) IN STEADY MOTION TO FORM SMALL DROPLETS OF SAID ORGANIC SOLUTION IN SAID WATER, REMOVING THE ORGANIC SOLVENT FROM THE MIXTURE WHILE CONTINUING THIS STEADY MOVEMENT, AND SEPARATING THE RESULTANT EXPANDABLE THERMOPLASTIC GRANULAR MATERIAL WITH A GRAIN SIZE OF 0.2 TO 4 MILLIMETERS FROM THE AQUEOUS PHASE.
Claim 2
Dependent Claim
142 words
A PROCESS FOR THE PRODUCTION OF EXPANDABLE GRANULAR MATERIALS FROM SYNTHETIC FILM-FORMING THERMOPLASTIC SUBSTANCES WHICH COMPRISES INTERMINGLING (A) WATER CONTAINING A SMALL AMOUNT OF A DISPERSING AGENT FOR ORGANIC LIQUIDS WHICH ARE IMMISCIBLE WITH WATER WITH (B) A 5 TO 50% SOLUTION OF A SYNTHETIC THERMOPLASTIC FILM-FORMING SUBSTANCE IN AN ORGANIC SOLVENT WHICH IS WATER IMMISCIBLE AND HAS A BOILING POINT BETWEEN 30* AND 90*C. AND WHICH SOLUTION ALSO CONTAINS DISSOLVED THEREIN 2 TO 40% BY WEIGHT WITH REFERENCE TO THE ORGANIC SOLVENT OF A WATER-INSOLUBLE EXANDING AGENT, KEEPING THE INTERMINGLED LIQUIDS (A) AND (B) IN STEADY MOTION TO FORM SMALL DROPLETS OF SAID ORGANIC SOLUTION IN SAID WATER, REMOVING THE ORGANIC SOLVENT FROM THE MIXTURE WHILE CONTINUING THIS STEADY MOVEMENT, AND SEPARATING THE RESULTANT EXPANDABLE THERMOPLASTIC GRANULAR MATERIAL WITH A GRAIN SIZE OF 0.2 TO 4 MILLIMETERS FROM THE AQUEOUS PHASE.
References Cited (Backward Citations)
US2744291A
Cited
US3018257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |