US3832243A
Expired / Lapsed
US
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Shape memory elements
Assignee: US Philips Corp
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Filing: 1971-01-14
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Granted: 1974-08-27
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Expires: 1991-01-14
Abstract
Abstract INTERMETALLIC COMPOUNDS WHICH, UPON COOLING BELOW A CHARACTERISTIC TEMPERATURE TF, ARE SUBJECTED TO A SO-CALLED MARTENSITE CRYSTAL TRANSFROMATION TO A CRYSTAL STRUCTURE HAVING A CLOSER PACKING MAY BE USED AS SHAPED MEMORY ELEMENTS. SHAPE MEMORY ELEMENTS HAVE THE PROPERTY THAT, AFTER DEFORMATION AT A TEMPERATURE BELOW TF, THEY REASSUME THEIR ORIGINAL SHAPED BY HEATING ABOVE TF.
Inventors
- 👤 H Donkersloot
- 👤 Vucht J Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:26
CPC Classifications
G; G01; G01K; G01K5/00; G01K5/48; G01K5/483; C; C22; C22C; C22C1/00; C22C1/02; C22C19/00; C22C28/00; C22C5/00; C22C9/00; C22C9/02; C22C9/04; C22F; C22F1/00; C22F1/006; H; H01; H01H; H01H37/00; H01H37/02; H01H37/32; H01H37/323
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |