US2832697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for applying antistatic agents to polymeric substances and destaticized articles thereby obtained
Assignee: Dow Chemical Co
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Filing: 1956-04-30
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Granted: 1958-04-29
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Expires: 1976-04-30
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm E Walles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:56
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/06; C08J7/065; C08J7/044; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
METHOD FOR DESTATICIZING HYDROPHOBIC, SUBSTITUTED, NON-AROMATIC HYDROCARBON POLYMERS AND ARTICLES MADE THEREFROM COMPRISED OF SUBSTANTIALLY LINEAR POLYMERS AND COPOLYMERS CONSISTING ESSENTIALLY OF THE POLYETHYLENIC MOLECULAR CHAIN TO WHICH ARE ATTACHED NON-AROMATIC SUBSTITUENTS WHICH COMPRISES SUBJECTING THE SURFACE OF THE POLYMER TO A SULFONATING REAGENT WHICH IS SELECTED FROM THE GROUP CONSISTING OF CONCENTRATED SULFURIC ACID CONTAINING AT LEAST ABOUT 80 PERCENT BY WEIGHT OF H2SO4, OLEUM WHICH CONTAINS LESS THAN ABOUT 20 PERCENT BY WEIGHT OF DISSOLVED, FREE SULFUR TRIOXIDE, ANHYDROUS SOLUTIONS CONTAINING OLEUM WHICH CONTAINS LESS THAN ABOUT 20 PECENT BY WEIGHT OF DISSOLVED, FREE SULFUR TRIOXIDE, AND FREE SULFUR TRIOXIDE, AND SUBSEQUENTLY APPLYING TO THE SULFONATED SURFACE AN ANTISTATIC AGENT THAT HAS BOTH HYDROPHOBIC AND HYDROPHILIC GROUPS AND CONTAINS A FUNCTIONAL BASIC NITROGEN ATOM IN ITS MOLECULE.
Claim 2
Dependent Claim
129 words
METHOD FOR DESTATICIZING HYDROPHOBIC, SUBSTITUTED, NON-AROMATIC HYDROCARBON POLYMERS AND ARTICLES MADE THEREFROM COMPRISED OF SUBSTANTIALLY LINEAR POLYMERS AND COPOLYMERS CONSISTING ESSENTIALLY OF THE POLYETHYLENIC MOLECULAR CHAIN TO WHICH ARE ATTACHED NON-AROMATIC SUBSTITUENTS WHICH COMPRISES SUBJECTING THE SURFACE OF THE POLYMER TO A SULFONATING REAGENT WHICH IS SELECTED FROM THE GROUP CONSISTING OF CONCENTRATED SULFURIC ACID CONTAINING AT LEAST ABOUT 80 PERCENT BY WEIGHT OF H2SO4, OLEUM WHICH CONTAINS LESS THAN ABOUT 20 PERCENT BY WEIGHT OF DISSOLVED, FREE SULFUR TRIOXIDE, ANHYDROUS SOLUTIONS CONTAINING OLEUM WHICH CONTAINS LESS THAN ABOUT 20 PECENT BY WEIGHT OF DISSOLVED, FREE SULFUR TRIOXIDE, AND FREE SULFUR TRIOXIDE, AND SUBSEQUENTLY APPLYING TO THE SULFONATED SURFACE AN ANTISTATIC AGENT THAT HAS BOTH HYDROPHOBIC AND HYDROPHILIC GROUPS AND CONTAINS A FUNCTIONAL BASIC NITROGEN ATOM IN ITS MOLECULE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-28 | 1961-10-28 | 1962-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-28 | 1965-10-28 | 1966-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-28 | 1969-10-28 | 1970-04-29 | $7700.00 | Window Closed / Lapsed |