US2616868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinning solutions of vinyl chloride polymer dissolved in a solvent mixture containing tetrahydrofurane and an additional solvent selected from the group consisting of lactones and lactams
Assignee: Glanzstoff AG
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Filing: 1951-04-18
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Granted: 1952-11-04
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Expires: 1971-04-18
Abstract
No abstract record available.
Inventors
- 👤 Heisenberg Erwin
- 👤 Kleine Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:02
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; D; D01; D01F; D01F6/00; D01F6/02; D01F6/08; D01F6/10; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A LIQUID COMPOSITION OF MATTER WHICH CAN BE SPUN TO FORM THREADS AND THE LIKE AND WHICH CAN BE CASE TO FORM FILMS, COMPRISING A VINYL CHLORIDE POLYMER AS SOLUTE IN SOLUTION IN TETRAHYDROFURANE AS SOLVENT, SAID SOLVENT HAVING ADMIXED THEREWITH FROM ABOUT 10% TO ABOUT 50% BY WEIGHT OF THE MIXTURE, OF AN ADDITIONAL SOLVENT SELECTED FROM THE GROUP CONSISTING OF LACTONES AND LACTAMS WHICH CAN DISSOLVED POLYACRYLONITRILE COMPLETELY BUT WHICH DO NOT BY THEMSELVES GIVE VINYL CHLORIDE POLYMER SOLUTIONS WHICH CAN BE SPUN.
Claim 2
Dependent Claim
85 words
A LIQUID COMPOSITION OF MATTER WHICH CAN BE SPUN TO FORM THREADS AND THE LIKE AND WHICH CAN BE CASE TO FORM FILMS, COMPRISING A VINYL CHLORIDE POLYMER AS SOLUTE IN SOLUTION IN TETRAHYDROFURANE AS SOLVENT, SAID SOLVENT HAVING ADMIXED THEREWITH FROM ABOUT 10% TO ABOUT 50% BY WEIGHT OF THE MIXTURE, OF AN ADDITIONAL SOLVENT SELECTED FROM THE GROUP CONSISTING OF LACTONES AND LACTAMS WHICH CAN DISSOLVED POLYACRYLONITRILE COMPLETELY BUT WHICH DO NOT BY THEMSELVES GIVE VINYL CHLORIDE POLYMER SOLUTIONS WHICH CAN BE SPUN.
References Cited (Backward Citations)
US2529449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |