Patent US3563973A successfully refreshed from Google Patents.
US3563973A
Expired / Lapsed
US
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Articles with polymeric memory and method of constructing same
Assignee: Radiation Applications Inc
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Filing: 1965-03-04
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Granted: 1971-02-16
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Expires: 1985-03-04
Abstract
Abstract THIS DISCLOSURE RELATES TO A NOVEL PROCESS FOR FORMING POLYMERIC STRUCTURES, FOR EXAMPLE, FOR MAKING TOY FIGURINES. IN THE PROCESS OF THIS INVENTION A POLYMERIC STRUCTURE COMPRISING POLYMERS OR COPOLYMERS OF ETHYLENE OR PROPYLENE ARE MOLDED TO A FIRST DESIRED SHAPE; THE STRUCTURES ARE THEN IRRADIATED TO CROSS-LINK THE POLYMER; SAID STRUCTURE IS THEN HEATED TO REDUCE ITS CRYSTALLINITY, WHEREUPON IT IS READILY COLLAPSED AND COOLED TO REDUCED ITS SIZE SEVERAL-FOLD. SUBSEQUENTLY THE POLYMERIC STRUCTURE CAN BE HEATED TO SUBSTANTIALLY DEVELOP ITS ORIGINAL SHAPE.
Inventors
- 👤 Sol J Arditti
- 👤 Souren Z Avedikian
- 👤 Bruce S Bernstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:06
CPC Classifications
B; B29; B29C; B29C61/00; B29C61/06; B29C61/0608
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |