Patent US3071818A successfully refreshed from Google Patents.
US3071818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing antistatic mouldings
Assignee: Toshiba Corp
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Filing: 1958-11-12
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Granted: 1963-01-08
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Expires: 1978-11-12
Abstract
No abstract record available.
Inventors
- 👤 Miura Yuzo
- 👤 Tsukada Tomomichi
- 👤 Hayashi Shizuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:16
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0075; B; B32; B32B; B32B27/00; C08K5/16; C08K5/20; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A METHOD FOR MANUFACTURING ANTISTATIC PLASTIC MOLDINGS COMPRISING THE STEPS OF (A) MIXING A THERMOPLASTIC RESIN POWDER SELECTED FROM THE GROUP CONSISTING OF VINYL CHLORIDE AND VINYL CHLORIDE COPOLYMER WITH A SOLUTION CONTAINING 0.22% BY WEIGHT ANTISTATIC AGENT, (B) VOLATILIZING THE RESULTANT SOLUTION TO FORM A COMPOSITE POWDER, (C) PRESSING SAID COMPOSITE POWDER TO FORM COATING TABLETS, (D) PRESSING THE THERMOPLASTIC RESIN POWDER TO FORM A CORE TABLET, (E) INTERPOSING ONE CORE TABLET BETWEEN TWO COATING TABLETS WHEREBY A LAMINATE STRUCTURE IS OBTAINED, AND (F) HOT-PRESSING THE RESULTANT LAMINATE STRUCTURE TO FORM A MOLDING, THE DIAMETER OF SAID MOLDING, IN A DIRECTION PERPENDICULAR TO THE PRESSING DIRECTION, BEING SUBSTANTIALLY LARGER THAN THE CORRESPONDING DIAMETERS OF SAID CORE TABLET OR SAID COATING TABLETS, WHEREBY SAID COATING TABLET COVERS THE CORE TABLET AND IS INCORPORATED TO A SUBSTANTIAL DEPTH THEREIN OVER THE ENTIRE SURFACE AREA OF SAID MOLDING.
Claim 2
Independent Claim
146 words
A METHOD FOR MANUFACTURING ANTISTATIC PLASTIC MOLDINGS COMPRISING THE STEPS OF (A) MIXING A THERMOPLASTIC RESIN POWDER SELECTED FROM THE GROUP CONSISTING OF VINYL CHLORIDE AND VINYL CHLORIDE COPOLYMER WITH A SOLUTION CONTAINING 0.22% BY WEIGHT ANTISTATIC AGENT, (B) VOLATILIZING THE RESULTANT SOLUTION TO FORM A COMPOSITE POWDER, (C) PRESSING SAID COMPOSITE POWDER TO FORM COATING TABLETS, (D) PRESSING THE THERMOPLASTIC RESIN POWDER TO FORM A CORE TABLET, (E) INTERPOSING ONE CORE TABLET BETWEEN TWO COATING TABLETS WHEREBY A LAMINATE STRUCTURE IS OBTAINED, AND (F) HOT-PRESSING THE RESULTANT LAMINATE STRUCTURE TO FORM A MOLDING, THE DIAMETER OF SAID MOLDING, IN A DIRECTION PERPENDICULAR TO THE PRESSING DIRECTION, BEING SUBSTANTIALLY LARGER THAN THE CORRESPONDING DIAMETERS OF SAID CORE TABLET OR SAID COATING TABLETS, WHEREBY SAID COATING TABLET COVERS THE CORE TABLET AND IS INCORPORATED TO A SUBSTANTIAL DEPTH THEREIN OVER THE ENTIRE SURFACE AREA OF SAID MOLDING.
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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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |