Patent US2875140A successfully refreshed from Google Patents.
US2875140A
Expired / Lapsed
US
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Method and apparatus for producing semiconductive structures
Assignee: Lanteris Space LLC
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Filing: 1954-04-21
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Granted: 1959-02-24
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Expires: 1974-04-21
Abstract
No abstract record available.
Inventors
- 👤 Thomas V Sikina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:54
CPC Classifications
H; H10; H10P; H10P50/00; H10D; H10D62/00; H10D62/10; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
THE METHOD OF CONTROLLING THE THICKNESS OF A SEMICONDUCTIVE BODY COMPRISING THE STEPS OF PRIGRESSIVELY AND CONTINUOUSLY ALTERING THE THICKNESS OF AT LEAST A REGION OF SAID BODY, APPLYING TO SAID REGION LIGHT RADIATION CONTAINING SPECTRAL COMPONENTS FOR WHICH SAID MATERIAL HAS SUBSTANTIALLY DIFFERENT TRANSMITTANCE FOR AT LEAST SOME THICKNESS PRODUCED DURING SAID ALTERING STEP, PROVIDING INDICATIONS OF THE RELATIVE STRENGTHS OF AT LEAST SOME OF THOSE SPECTUAL COMPONENTS TRANSMITTED BY SAID REGION OF SAID BODY, AND MODIFYING SAID ALTERING OF SAID THICKNESS UPON ATHE OCCURRENCE OF A CHANGE IN SAID INDICATIONS.
Claim 2
Independent Claim
92 words
THE METHOD OF CONTROLLING THE THICKNESS OF A SEMICONDUCTIVE BODY COMPRISING THE STEPS OF PRIGRESSIVELY AND CONTINUOUSLY ALTERING THE THICKNESS OF AT LEAST A REGION OF SAID BODY, APPLYING TO SAID REGION LIGHT RADIATION CONTAINING SPECTRAL COMPONENTS FOR WHICH SAID MATERIAL HAS SUBSTANTIALLY DIFFERENT TRANSMITTANCE FOR AT LEAST SOME THICKNESS PRODUCED DURING SAID ALTERING STEP, PROVIDING INDICATIONS OF THE RELATIVE STRENGTHS OF AT LEAST SOME OF THOSE SPECTUAL COMPONENTS TRANSMITTED BY SAID REGION OF SAID BODY, AND MODIFYING SAID ALTERING OF SAID THICKNESS UPON ATHE OCCURRENCE OF A CHANGE IN SAID INDICATIONS.
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) | 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 |