US3703569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corona treatment of antistat containing sheet of ethylene or ethylene copolymer
Assignee: Kimberly Clark Tissue Co
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Filing: 1970-03-23
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Granted: 1972-11-21
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Expires: 1990-03-23
Abstract
Abstract A METHOD OF PREPARING A SHEET COMPRISING THERMOPLASTIC POLYMERIC MATERIAL SELECTED FROM POLYETHYLENE AND COPOLYMERS OF ETHYLENE AND PROPYLENE AND AN ANTISTATIC AGENT WHICH INCLUDES THE STEP OF SUBJECTING THE SHEET TO CORONA TREATMENT, WHEREBY THE STATIC DECAY RATE OF THE SHEET IS INCREASED. THE AMOUNT OF ANTISTAT IS AT LEAST THE AMOUNT WHICH GIVES AN ADEQUATE STATIC DECAY RATE TO THE SHEET AFTER BEING MODIFIED BY CORONA TREATMENT BUT LESS THAN THE AMOUNT SUFFICIENT TO PRODUCE A MEASURABLE INCREASE IN THE STATIC DECAY RATE OF THE SHEET IN THE ABSENCE OF CORONA TREATMENT.
Inventors
- 👤 Richard I Wolkowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:14
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/10; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/25; B29C48/88; B29C48/911; B29C48/9135; B29C48/914; B29C48/915; B29C48/9165; B41; B41M; B41M1/00; B41M1/26; B41M1/30; B41M1/305; G; G03; G03C; G03C1/00; G03C1/76; G03C1/85
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |