Patent US3143447A successfully refreshed from Google Patents.
US3143447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical etches for lead telluride crystals
Assignee: Individual
•
Filing: 1960-12-22
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Granted: 1964-08-04
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Expires: 1980-12-22
Abstract
No abstract record available.
Inventors
- 👤 Marriner K Norr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:48
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/32; C23F1/40; H; H10; H10N; H10N10/00; H10N10/80; H10N10/85; H10N10/851; H10N10/852; H10P; H10P95/00; C01; C01P; C01P2002/00; C01P2002/02; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A SOLUTION FOR ETCHING LEAD TELLURIDE CRYSTALS CONSISTING ESSENTIALLY OF IODATE AND HYDROXYL IONS.
Claim 2
Dependent Claim
14 words
A SOLUTION FOR ETCHING LEAD TELLURIDE CRYSTALS CONSISTING ESSENTIALLY OF IODATE AND HYDROXYL IONS.
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) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |