Patent US2875141A successfully refreshed from Google Patents.
US2875141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for use in forming semiconductive structures
Assignee: Lanteris Space LLC
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Filing: 1954-08-12
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Granted: 1959-02-24
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Expires: 1974-08-12
Abstract
No abstract record available.
Inventors
- 👤 Robert N Noyce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:32
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/02; C25F3/12; H; H10; H10P; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN A METHOD FOR PRODUCING A BODY OF SEMI-CONDUCTIVE MATERIAL AT LEAST A PORTION OF WHICH IS OF A DESIRED THICKNESS, THE STEPS OF: ETCHING SAID BODY PORTION WITH AN ETCHANT AT LEAST PARTIALLY TRANSLUCENT TO LIGHT COMPONENTS HAVING A FIRST SET OF WAVELENGTHS; SIMULTANEOUSLY PASSING LIGHT COMPONENTS HAVING SAID FIRST SET OF WAVELENGTHS THROUGH SAID BODY AND SAID ETCHANT; DERIVING INDICATIONS OF THE COMBINED STRENGTHS OF THOSE OF SAID LIGHT COMPONENTS TRANSMITTED BY SAID BODY AND LYING WITHIN A PREDETERMINED BAND; AND MODIFYING SAID ETCHING UPON THE OCCURENCE OF A CHARACTERISTIC CHANGE IN SAID INDICATIONS.
Claim 2
Dependent Claim
96 words
IN A METHOD FOR PRODUCING A BODY OF SEMI-CONDUCTIVE MATERIAL AT LEAST A PORTION OF WHICH IS OF A DESIRED THICKNESS, THE STEPS OF: ETCHING SAID BODY PORTION WITH AN ETCHANT AT LEAST PARTIALLY TRANSLUCENT TO LIGHT COMPONENTS HAVING A FIRST SET OF WAVELENGTHS; SIMULTANEOUSLY PASSING LIGHT COMPONENTS HAVING SAID FIRST SET OF WAVELENGTHS THROUGH SAID BODY AND SAID ETCHANT; DERIVING INDICATIONS OF THE COMBINED STRENGTHS OF THOSE OF SAID LIGHT COMPONENTS TRANSMITTED BY SAID BODY AND LYING WITHIN A PREDETERMINED BAND; AND MODIFYING SAID ETCHING UPON THE OCCURENCE OF A CHARACTERISTIC CHANGE IN SAID INDICATIONS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |