US3639518A
Expired / Lapsed
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Anti-static polymer compositions with discoloration suppressors
Assignee: Dow Chemical Co Ltd
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Filing: 1967-09-29
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Granted: 1972-02-01
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Expires: 1987-09-29
Abstract
Abstract AN ANTISTATIC COMPOSITION FOR USE WITH POLYSTYRENE, POLYOLEFINS AND OTHER HYDROCARBON POLYMERS COMPRISING AN ALKANOLAMIDE OF ORGANIC ACID AND, DISCOLOURATION SUPPRESSOR, AN OXIDE, HYDROXIDE, CARBONATE, BICARBONATE OR CARBOXYLATE OF AMMONIUM OR METALS SUCH AS SODIUM, POTASSIUM, MAGNESIUM OR CALCIUM.
Inventors
- 👤 Thomas Ellis Davies
- 👤 Hubert Brian Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:33
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/20; C08K13/00; C08K13/02; Y; Y10; Y10S; Y10S524/00; Y10S524/91; Y10S524/911; Y10S524/913
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |