Patent US2766478A successfully refreshed from Google Patents.
Patent US2937066A successfully refreshed from Google Patents.
US2937066A
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Method for treating polyethylene and treated polyethylene articles thereby obtained
Assignee: Dow Chemical Co
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Filing: 1955-11-23
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Granted: 1960-05-17
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Expires: 1975-11-23
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm E Walles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:16
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/14; D; D06; D06M; D06M11/00; D06M11/51; D06M11/55; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/21; Y10S8/00; Y10S8/09; Y10S8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
METHOD FOR TREATING POLYETHYLENE ARTICLES TO RENDER THEM DYE-RECEPTIVE AND TO IMPROVE THEIR ANTI-STATIC CHARACTERISTICS WHICH COMPRISES SUBJECTING THE SURFACE OF THE POLYETHYLENE ARTICLE TO A SULFONATING REAGENT WHICH IS SELECTED FROM THE GROUP CONSISTING OF CONCENTRATED SULFURIC ACID CONTAINING AT LEAST ABOUT 98 PERCENT BY WEIGHT OF H2SO4, OLEUM, AND ANHYDROUS SOLUTIONS OF OLEUM AT A TEMPERATURE BETWEEN THE FREEZING POINT OF THE REAGENT AND ABOUT 150*C., CONTINUING SAID TREATMENT FOR A PERIOD OF TIME RANGING FROM SEVERAL SECONDS TO SEVERAL HOURS, IN INVERSE RATIO TO THE STRENGTH OF THE REAGENT AND INVERSELY PROPORTIONALLY TO THE TREATING TEMPERATURE EMPLOYED.
Claim 2
Dependent Claim
100 words
METHOD FOR TREATING POLYETHYLENE ARTICLES TO RENDER THEM DYE-RECEPTIVE AND TO IMPROVE THEIR ANTI-STATIC CHARACTERISTICS WHICH COMPRISES SUBJECTING THE SURFACE OF THE POLYETHYLENE ARTICLE TO A SULFONATING REAGENT WHICH IS SELECTED FROM THE GROUP CONSISTING OF CONCENTRATED SULFURIC ACID CONTAINING AT LEAST ABOUT 98 PERCENT BY WEIGHT OF H2SO4, OLEUM, AND ANHYDROUS SOLUTIONS OF OLEUM AT A TEMPERATURE BETWEEN THE FREEZING POINT OF THE REAGENT AND ABOUT 150*C., CONTINUING SAID TREATMENT FOR A PERIOD OF TIME RANGING FROM SEVERAL SECONDS TO SEVERAL HOURS, IN INVERSE RATIO TO THE STRENGTH OF THE REAGENT AND INVERSELY PROPORTIONALLY TO THE TREATING TEMPERATURE EMPLOYED.
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) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |