US3268489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antistatic treatment of resins
Assignee: PPG Industries Inc
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Filing: 1962-02-13
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Granted: 1966-08-23
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Expires: 1982-02-13
Abstract
No abstract record available.
Inventors
- 👤 William R Dial
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:49
CPC Classifications
C; C08; C08F; C08F22/00; C08F22/04; C08F8/00; Y; Y10; Y10S; Y10S260/00; Y10S260/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A METHOD OF IMPARTING ANTISTATIC PROPERTIES TO THE SURFACE OF A COPOLYMER OF A MIXTURE OF FROM 1 TO ABOUT 10 PERCENT BY WEIGHT OF A DIBASIC ACID ANHYDRIDE HAVING UP TO 18 CARBON ATOMS AND ABOUT 90 TO 99 PERCENT BY WEIGHT OF SUBSTITUTED ETHYLENE SELECTED FROM THE GROUP CONSISTING OF PROPYLENEM ALKYL ACRYLATES, ALKYL METHACRYLATES, STYRENE, A-METHYLSTYRENE, VINYL CHLORIDE, VINYL ESTERS, VINYL ETHERS, 2-CHLOROPROPENE AND VINYLNAPHTHALENE, SAID MIXTURE BEING POLYMERIZED IN THE PRESENCE OF A FREE RADICAL CATALYST, WHICH COMPRISES APPLYING TO THE SURFACE OF THE COPOLYMER A HOT, AQUEOUS MEDIUM AT A TEMPERATURE ABOVE 80* C., SAID AQUEOUS MEDIUM BEING SELECTED FROM A GROUP CONSISTING OF WATER AND AQUEOUS SOLUTIONS CONSISTING OF WATER AND A WATER SOLUBLE ORGANIC BASE, SAID COPOLYMER BEING INSOLUBLE IN SAID HOT AQUEOUS MEDIA, REMOVING SAID HOT AQUEOUS MEDIA FROM THE SURFACE OF SAID COPOLYMER AND OBTAINING A POLYMERIC PRODUCT HAVING ELECTRICALLY CONDUCTING GROUPS ON THE SURFACE THEREOF.
Claim 2
Independent Claim
155 words
A METHOD OF IMPARTING ANTISTATIC PROPERTIES TO THE SURFACE OF A COPOLYMER OF A MIXTURE OF FROM 1 TO ABOUT 10 PERCENT BY WEIGHT OF A DIBASIC ACID ANHYDRIDE HAVING UP TO 18 CARBON ATOMS AND ABOUT 90 TO 99 PERCENT BY WEIGHT OF SUBSTITUTED ETHYLENE SELECTED FROM THE GROUP CONSISTING OF PROPYLENEM ALKYL ACRYLATES, ALKYL METHACRYLATES, STYRENE, A-METHYLSTYRENE, VINYL CHLORIDE, VINYL ESTERS, VINYL ETHERS, 2-CHLOROPROPENE AND VINYLNAPHTHALENE, SAID MIXTURE BEING POLYMERIZED IN THE PRESENCE OF A FREE RADICAL CATALYST, WHICH COMPRISES APPLYING TO THE SURFACE OF THE COPOLYMER A HOT, AQUEOUS MEDIUM AT A TEMPERATURE ABOVE 80* C., SAID AQUEOUS MEDIUM BEING SELECTED FROM A GROUP CONSISTING OF WATER AND AQUEOUS SOLUTIONS CONSISTING OF WATER AND A WATER SOLUBLE ORGANIC BASE, SAID COPOLYMER BEING INSOLUBLE IN SAID HOT AQUEOUS MEDIA, REMOVING SAID HOT AQUEOUS MEDIA FROM THE SURFACE OF SAID COPOLYMER AND OBTAINING A POLYMERIC PRODUCT HAVING ELECTRICALLY CONDUCTING GROUPS ON THE SURFACE THEREOF.
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |