Patent US2502841A successfully refreshed from Google Patents.
US2502841A
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Method of modifying the surface characteristics of polyethylene structures and product resulting therefrom
Assignee: Visking Corp
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Filing: 1946-02-05
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Granted: 1950-04-04
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Expires: 1966-02-05
Abstract
No abstract record available.
Inventors
- 👤 William F Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:17
CPC Classifications
B; B41; B41M; B41M1/00; B41M1/26; B41M1/30; B41M1/305; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/26; Y10T428/263; Y10T428/31; Y10T428/31504; Y10T428/31855
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A PROCESS FOR TREATING POLYETHYLENE FILMS WHICH CONSISTS IN SUBJECTING THE SURFACE OF SUCH FILMS TO THE ACTION OF GASEOUS CHLORINE TO FORM A SUPERFICIALLY CHLORINATED POLYETHYLENE SURFACE, AND THEN IMPRINTING SUCH CHLORINATED SURFACE WITH A PRINTING INK.
Claim 2
Dependent Claim
38 words
A PROCESS FOR TREATING POLYETHYLENE FILMS WHICH CONSISTS IN SUBJECTING THE SURFACE OF SUCH FILMS TO THE ACTION OF GASEOUS CHLORINE TO FORM A SUPERFICIALLY CHLORINATED POLYETHYLENE SURFACE, AND THEN IMPRINTING SUCH CHLORINATED SURFACE WITH A PRINTING INK.
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) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |