US2557474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat stabilization of vinyl polymers and copolymers
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1948-02-10
•
Granted: 1951-06-19
•
Expires: 1968-02-10
Abstract
No abstract record available.
Inventors
- 👤 Sanderson Albert Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:37
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/215; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS FOR THE PRODUCTION OF IMPROVED COMPOSITION COMPRISING AN AQUEOUS DISPERSION OF A POLYMERIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYMERS OF VINYL CHLORIDE AND COPOLYMERS OF VINYL CHLORIDE WITH OTHER EHTYLENICALLY UNSATURATED COMPOUNDS, SAID DISPERSION CONTAINING AN ELECTROLYTE HEAT STABILIZER FOR VINYL CHLORIDE POLYMERS AND COPOLYMERS, WHICH COMPRISES MIXING AN AQUEOUS DISPERSION OF THE POLYMERIC MATERIAL WITH AN AQUEOUS SOLUTION CONTAINING SAID ELECTROLYTE HEAT STABILIZER AND AN EMULSIFYING AGENT.
Claim 2
Dependent Claim
72 words
A PROCESS FOR THE PRODUCTION OF IMPROVED COMPOSITION COMPRISING AN AQUEOUS DISPERSION OF A POLYMERIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYMERS OF VINYL CHLORIDE AND COPOLYMERS OF VINYL CHLORIDE WITH OTHER EHTYLENICALLY UNSATURATED COMPOUNDS, SAID DISPERSION CONTAINING AN ELECTROLYTE HEAT STABILIZER FOR VINYL CHLORIDE POLYMERS AND COPOLYMERS, WHICH COMPRISES MIXING AN AQUEOUS DISPERSION OF THE POLYMERIC MATERIAL WITH AN AQUEOUS SOLUTION CONTAINING SAID ELECTROLYTE HEAT STABILIZER AND AN EMULSIFYING AGENT.
References Cited (Backward Citations)
US1814420A
Cited
US2147154A
Cited
US2365400A
Cited
US2333280A
Cited
US2365506A
Cited
US2404781A
Cited
US2410775A
Cited
US2476474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |