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Patent US2845541A successfully refreshed from Google Patents.
US2845541A
Expired / Lapsed
US
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Polyethylene films
Assignee: British Cellophane Ltd
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Filing: 1954-11-29
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Granted: 1958-07-29
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Expires: 1974-11-29
Abstract
No abstract record available.
Inventors
- 👤 Berry William
- 👤 Rose Richard Arthur
- 👤 Bruce Charles Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:24
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/16; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/123; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0827; B29L; B29L2023/00; B29L2023/001; Y; Y10; Y10S; Y10S8/00; Y10S8/09; Y10S8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD OF RENDERING THE SURFACE OF A SOLID POLYETHYLENE FILM RECEPTIVE TO PRINTING INKS, WHICH METHOD COMPRISES PASSING THE FILM INTO AN ULTRA VIOLET LIGHT IRRADIATION TREATMENT ZONE IN WHICH AT LEAST ONE SURFACE OF THE FILM IS IRRADIATED WITH ULTRA VIOLET LIGHT OF AN INTENSITY OF AT LEAST 0.5 MICROWATT PER SQUARE CENTIMETER OF SAID FILM SURFACE, MAINTAINING THE FILM WITHIN THE ZONE FOR SUCH A PERIOD THAT THE TOTAL IRRADIATION IS AT LEAST 180 MICROWATT SECONDS PER SQUARE CENTIMETER OF SAID FILM SURFACE AND THEN REMOVING THE TREATED FILM FROM THE IRRADIATION ZONE.
Claim 2
Independent Claim
96 words
A METHOD OF RENDERING THE SURFACE OF A SOLID POLYETHYLENE FILM RECEPTIVE TO PRINTING INKS, WHICH METHOD COMPRISES PASSING THE FILM INTO AN ULTRA VIOLET LIGHT IRRADIATION TREATMENT ZONE IN WHICH AT LEAST ONE SURFACE OF THE FILM IS IRRADIATED WITH ULTRA VIOLET LIGHT OF AN INTENSITY OF AT LEAST 0.5 MICROWATT PER SQUARE CENTIMETER OF SAID FILM SURFACE, MAINTAINING THE FILM WITHIN THE ZONE FOR SUCH A PERIOD THAT THE TOTAL IRRADIATION IS AT LEAST 180 MICROWATT SECONDS PER SQUARE CENTIMETER OF SAID FILM SURFACE AND THEN REMOVING THE TREATED FILM FROM THE IRRADIATION ZONE.
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) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |