US2851735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing molded article from vinyl chloride polymer and a polyamide
Assignee: Dunlop Rubber Co Ltd
•
Filing: 1955-10-07
•
Granted: 1958-09-16
•
Expires: 1975-10-07
Abstract
No abstract record available.
Inventors
- 👤 Hogg Wilfrid Henry
- 👤 Mobberley Wyndham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:56
CPC Classifications
C; C08; C08L; C08L77/00; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L77/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
A METHOD OF PREPARING A MOLDED ARTICLE WHICH COMPRISES HEATING IN A MILD TO A TEMPERATURE OF 140*C. TO 180*C. A MIXTURE OF RESINOUS POLYMER OF VINYL CHLORIDE AND 1 PERCENT TO 15 PERCENT OF ITS WEIGHT OF AN AMIDE OF A DI-OLEFINIC DICARBOXYLIC ACID HAVING A CHAIN IN THE MOLECULE CONTAINING AT LEAST 10 CARBON ATOMS AND AN ALKYLENE POLYAMINE, SAID AMIDE HAVING IN THE MOLECULE MORE THAN ONE MEMBER SELECTED FROM THE CLASS CONSISTING OF PRIMARY AND SECONDARY AMINO GROUPSM AND REMOVING THE ARTICLE FROM THE MOLD BEFORE ANY SUBSTANTIAL REDUCTION IN THE TEMPERATURE OF THE ARTICLE HAS OCCURED.
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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |