Patent US4632894A successfully refreshed from Google Patents.
Patent US3438810A successfully refreshed from Google Patents.
US3438810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making silicon
Assignee: Motorola Solutions Inc
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Filing: 1966-04-04
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Granted: 1969-04-15
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Expires: 1986-04-04
Abstract
No abstract record available.
Inventors
- 👤 Theodore S Benedict
- 👤 Albert E Ozias Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:47
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/02; H; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/041; Y10S148/051; Y10S148/071; Y10S148/12; Y10S148/134; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2956; Y10T428/298
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A METHOD OF MAKING SEMICONDUCTOR MATERIAL WHICH COMPRISES THE STEPS OF: (A) PROVIDING A HIGH PURITY SEMICONDUCTOR STARTING ELEMENT, (B) FORMING A CONDUCTIVE LAYER ON SAID ELEMENT TO PROVIDE A CONDUCTIVE SEMICONDUCTOR BODY, (C) ELECTRICALLY HEATING SAID BODY TO AN ELEVATED TEMPERATURE, (D) REMOVING SAID CONDUCTIVE LAYER FROM SAID BODY AND (E) PRECIPITATING SEMICONDUCTOR MATERIAL THEREON.
Claim 2
Independent Claim
56 words
A METHOD OF MAKING SEMICONDUCTOR MATERIAL WHICH COMPRISES THE STEPS OF: (A) PROVIDING A HIGH PURITY SEMICONDUCTOR STARTING ELEMENT, (B) FORMING A CONDUCTIVE LAYER ON SAID ELEMENT TO PROVIDE A CONDUCTIVE SEMICONDUCTOR BODY, (C) ELECTRICALLY HEATING SAID BODY TO AN ELEVATED TEMPERATURE, (D) REMOVING SAID CONDUCTIVE LAYER FROM SAID BODY AND (E) PRECIPITATING SEMICONDUCTOR MATERIAL THEREON.
References Cited (Backward Citations)
US3240623A
Cited
US3279946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |