US2934457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating polyethylene film
Assignee: Bjorksten Research Laboratories Inc
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Filing: 1953-04-22
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Granted: 1960-04-26
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Expires: 1973-04-22
Abstract
No abstract record available.
Inventors
- 👤 John C Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:34
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/126; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06; Y; Y10; Y10S; Y10S8/00; Y10S8/09; Y10S8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
THE PROCESS FOR TREATING POLYETHYLENE FILM WHICH CONSISTS OF SUBJECTING THE SURFACE OF POLYETHYLENE FILM TO THE ACTION OF A LIQUID MIXTURE CONSISTING OF 20 TO 40% OF FUMING NITRIC ACID AND 60 TO 80% OF COMMERICIAL HYDROCHLORIC ACID TO FORM A SUPERFICIALLY CHLORINATED POLYETHYLENE SURFACE.
Claim 2
Dependent Claim
46 words
THE PROCESS FOR TREATING POLYETHYLENE FILM WHICH CONSISTS OF SUBJECTING THE SURFACE OF POLYETHYLENE FILM TO THE ACTION OF A LIQUID MIXTURE CONSISTING OF 20 TO 40% OF FUMING NITRIC ACID AND 60 TO 80% OF COMMERICIAL HYDROCHLORIC ACID TO FORM A SUPERFICIALLY CHLORINATED POLYETHYLENE SURFACE.
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) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |