Patent US3262825A successfully refreshed from Google Patents.
US3262825A
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Method for etching crystals of group iii(a)-v(a) compounds and etchant used therefor
Assignee: AT&T Inc
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Filing: 1961-12-29
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Granted: 1966-07-26
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Expires: 1981-12-29
Abstract
No abstract record available.
Inventors
- 👤 Calvin S Fuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:40
CPC Classifications
B; B24; B24B; B24B1/00; B24B37/00; B24B37/04; C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/30; C23F3/00; C23F3/04; H; H10; H10P; H10P50/00; H10P50/60; H10P50/64; H10P50/642; H10P50/646; H10P52/00; H10P52/40; H10P52/402
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
86 words
THE METHOD OF ETCHING CRYSTALS OF A COMPOUND OF THE GROUP III(A)-V(A) SYSTEM OF THE PERIODIC TABLE WHICH COMPRISES WETTING SAID CRYSTALS WITH A SUBSTANTIALLY ANHYDROUS MIXTURE CONSISTING ESSENTIALLY OF AN ORGANIC LIQUID SELECTED FROM THE GROUP CONSISTING OF GLACIAL ACETIC ACID, METHANOL AND THE CHLORINATED METHANES, AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A HALOGEN SELECTED FROM AMONG CHLORINE, BORMINE AND IODINE, THE SAID HALOGEN BEING PRESENT IN AN AMOUNT OF AT LEAST 2 MG, PER CM.2 BY VOLUME OF THE TOTAL SOLUTION.
Claim 2
Independent Claim
86 words
THE METHOD OF ETCHING CRYSTALS OF A COMPOUND OF THE GROUP III(A)-V(A) SYSTEM OF THE PERIODIC TABLE WHICH COMPRISES WETTING SAID CRYSTALS WITH A SUBSTANTIALLY ANHYDROUS MIXTURE CONSISTING ESSENTIALLY OF AN ORGANIC LIQUID SELECTED FROM THE GROUP CONSISTING OF GLACIAL ACETIC ACID, METHANOL AND THE CHLORINATED METHANES, AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A HALOGEN SELECTED FROM AMONG CHLORINE, BORMINE AND IODINE, THE SAID HALOGEN BEING PRESENT IN AN AMOUNT OF AT LEAST 2 MG, PER CM.2 BY VOLUME OF THE TOTAL SOLUTION.
Claim 3
Dependent Claim
65 words
AN ETCHANT CONSISTING ESSENTIALLY OF A SUBSTANTIALLY ANHYDROUS MIXTURE OF AN ORGANIC LIQUID SELECTED FROM THE GROUP CONSISTING OF GLACIAL ACETIC ACID, METHANOL AND THE CHLORINATED METHANES, AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A HALOGEN SELECTED FROM AMONG CHLORINE, BROMINE AND IODINE, SAID HALOGEN BEING PRESENT IN AN AMOUNT OF AT LEAST 2 MG. PER CM.2 BY VOLUME OF THE TOTAL SOLUTION.
Claim 4
Dependent Claim
65 words
AN ETCHANT CONSISTING ESSENTIALLY OF A SUBSTANTIALLY ANHYDROUS MIXTURE OF AN ORGANIC LIQUID SELECTED FROM THE GROUP CONSISTING OF GLACIAL ACETIC ACID, METHANOL AND THE CHLORINATED METHANES, AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A HALOGEN SELECTED FROM AMONG CHLORINE, BROMINE AND IODINE, SAID HALOGEN BEING PRESENT IN AN AMOUNT OF AT LEAST 2 MG. PER CM.2 BY VOLUME OF THE TOTAL SOLUTION.
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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) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |