US2698780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating germanium for translating devices
Assignee: AT&T Inc
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Filing: 1953-02-03
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Granted: 1955-01-04
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Expires: 1973-02-03
Abstract
No abstract record available.
Inventors
- 👤 Ralph A Logan
- 👤 Sparks Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:06
CPC Classifications
H; H10; H10P; H10P70/00; H10P70/10; H10P70/15; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
THE METHOD OF PREPARATION A BODY OF GERMANIUM FOR USE IN A SIGNAL TRANSLATING DEVICE WHICH COMPRISES TREATING A SURFACE OF THE BODY IN A SOLUTION OF POTASSIUM CYANIDE.
Claim 2
Independent Claim
29 words
THE METHOD OF PREPARATION A BODY OF GERMANIUM FOR USE IN A SIGNAL TRANSLATING DEVICE WHICH COMPRISES TREATING A SURFACE OF THE BODY IN A SOLUTION OF POTASSIUM CYANIDE.
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) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |