US3529655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making composites of magnesium and silicon carbide whiskers
Assignee: Dow Chemical Co
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Filing: 1966-10-03
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Granted: 1970-09-22
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Expires: 1986-10-03
Abstract
No abstract record available.
Inventors
- 👤 Garth D Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:15
CPC Classifications
C; C22; C22C; C22C49/00; C22C49/02; C22C49/04; B; B22; B22D; B22D21/00; B22D21/002; B22D21/007; Y; Y10; Y10S; Y10S264/00; Y10S264/19; Y10T; Y10T428/00; Y10T428/12; Y10T428/12465; Y10T428/12486
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A PROCESS FOR THE PREPARATION OF COMPOSITES OF MAGNESIUM AND SILICON CARBIDED WHISKERS WHICH COMPRISES PROVIDING A MOLD HAVING AT LEAST ONE OPENING TO THE ATMOSPHERE AND CONTAINING SILICON CARBIDE WHISKERS IN AN AMOUNT OF FROM ABOUT 1 TO ABOUT 90 VOLUME PERCENT OF THE INTERIOR VOLUME OF THE MOLD, SAID SILICON CARBIDE WHISKERS AND THE INTERIOR OF SAID MOLD BEING SUBSTANTIALLY ANHYDROUS, IMMERSING SAID WHISKER-CONTAINING MOLD INTO A BATH OF MOLTEN MAGNESIUM SUCH THAT ALL OPENINGS IN SAID MOLD ARE BELOW THE SURFACE OF THE MOLTEN MAGNESIUM FOR A TIME SUFFICIENT FOR THE MAGNESIUM TO FILL THE REMAINING VOLUME OF THE MOLD CAVITY, REMOVING THE FILLED MOLD FROM THE MOLTEN MAGNESIUM BATH AND ALLOWING THE MAGNESIUM IN THE MOLD TO SOLIDIFY.
Claim 2
Dependent Claim
122 words
A PROCESS FOR THE PREPARATION OF COMPOSITES OF MAGNESIUM AND SILICON CARBIDED WHISKERS WHICH COMPRISES PROVIDING A MOLD HAVING AT LEAST ONE OPENING TO THE ATMOSPHERE AND CONTAINING SILICON CARBIDE WHISKERS IN AN AMOUNT OF FROM ABOUT 1 TO ABOUT 90 VOLUME PERCENT OF THE INTERIOR VOLUME OF THE MOLD, SAID SILICON CARBIDE WHISKERS AND THE INTERIOR OF SAID MOLD BEING SUBSTANTIALLY ANHYDROUS, IMMERSING SAID WHISKER-CONTAINING MOLD INTO A BATH OF MOLTEN MAGNESIUM SUCH THAT ALL OPENINGS IN SAID MOLD ARE BELOW THE SURFACE OF THE MOLTEN MAGNESIUM FOR A TIME SUFFICIENT FOR THE MAGNESIUM TO FILL THE REMAINING VOLUME OF THE MOLD CAVITY, REMOVING THE FILLED MOLD FROM THE MOLTEN MAGNESIUM BATH AND ALLOWING THE MAGNESIUM IN THE MOLD TO SOLIDIFY.
References Cited (Backward Citations)
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US3364976A
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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) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |