Patent US2993234A successfully refreshed from Google Patents.
US2993234A
Expired / Lapsed
US
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Method of manufacturing antistatic record disks
Assignee: Toshiba Corp
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Filing: 1958-10-27
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Granted: 1961-07-25
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Expires: 1978-10-27
Abstract
No abstract record available.
Inventors
- 👤 Miura Yuzo
- 👤 Hayashi Shizuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:23
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/16; C08; C08K; C08K5/00; C08K5/0008; C08K5/0075
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
A METHOD OF MANUFACTURING ANTISTATIC RECORD DISKS WHICH COMPRISES MOLDING COATED FINELY DIVIDED PARTICLES OF RESIN POWDER AT A SUFFICIENTLY LOW TEMPERATURE AND PRESSURE TO MAINTAIN THE BASIC PHYSICAL RELATIONSHIP BETWEEN THE RESIN PARTICLES AND THE SURROUNDING ANTISTATIC AGENT IN THE SURFACE PORTION OF THE RESULTING MOLDED ARTICLE, SAID RESIN BEING SELECTED FROM THE GROUP CONSISTING OF POLYVINYL CHLORIDE AND A VINYL CHLORIDE COPOLYMER.
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) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |