Patent US5643604A successfully refreshed from Google Patents.
US3284331A
Expired / Lapsed
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Adherability treatment of thermo-plastic film
Assignee: EIDP Inc
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Filing: 1965-06-10
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Granted: 1966-11-08
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Expires: 1985-06-10
Abstract
No abstract record available.
Inventors
- 👤 Richard T Mcbride
- 👤 Jr John H Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:12
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A PROCESS FOR TREATING AN ORGANIC THERMOPLASTIC POLYMERIC FILM WHICH COMPRISES PASSING THE ORGANIC THERMOPLASTIC POLYMERIC FILM ONTO AN ELECTRICALLY GROUNDED MOVING SURFACE; DEPOSITING AN ELECTRICAL CHARGE OF AT LEAST 0.23 MICROCOULOMB PER SQUARE INCH ON THE UPPER SURFACE OF THE FILM AT LEAST ADJACENT TO EACH SIDE EDGE OF THE FILM WHEREBY SAID FILM ADHERES FIRMLY TO SAID MOVING SURFACE; AND THEREAFTER SUBJECTING SAID FILM TO AN ELETRICAL DISCHARGE AT SUBSTANTIALLY ATMOSPHERIC PRESSURE BETWEEN SPACED ELECTRODES, ONE OF WHICH IS THE ELECTRICALLY GROUNDED MOVING SURFACE, CONTINUOUSLY APPLYING TO SAID ELECTRODES AN ALTERNATING CURRENT AT A VOLTAGE IN EXCESS OF 1,000 VOLTS AND AT A FREQUENCY IN EXCESS OF 350 CYCLES PER SECOND IN AN ATMOSPHERE EFFECTIVE TO CREATE AN ELECTRICAL DISCHARGE BETWEEN SAID ELCTRODES.
Claim 2
Dependent Claim
125 words
A PROCESS FOR TREATING AN ORGANIC THERMOPLASTIC POLYMERIC FILM WHICH COMPRISES PASSING THE ORGANIC THERMOPLASTIC POLYMERIC FILM ONTO AN ELECTRICALLY GROUNDED MOVING SURFACE; DEPOSITING AN ELECTRICAL CHARGE OF AT LEAST 0.23 MICROCOULOMB PER SQUARE INCH ON THE UPPER SURFACE OF THE FILM AT LEAST ADJACENT TO EACH SIDE EDGE OF THE FILM WHEREBY SAID FILM ADHERES FIRMLY TO SAID MOVING SURFACE; AND THEREAFTER SUBJECTING SAID FILM TO AN ELETRICAL DISCHARGE AT SUBSTANTIALLY ATMOSPHERIC PRESSURE BETWEEN SPACED ELECTRODES, ONE OF WHICH IS THE ELECTRICALLY GROUNDED MOVING SURFACE, CONTINUOUSLY APPLYING TO SAID ELECTRODES AN ALTERNATING CURRENT AT A VOLTAGE IN EXCESS OF 1,000 VOLTS AND AT A FREQUENCY IN EXCESS OF 350 CYCLES PER SECOND IN AN ATMOSPHERE EFFECTIVE TO CREATE AN ELECTRICAL DISCHARGE BETWEEN SAID ELCTRODES.
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |