US2768100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface treatment of germanium circuit elements
Assignee: AT&T Inc
•
Filing: 1953-09-30
•
Granted: 1956-10-23
•
Expires: 1973-09-30
Abstract
No abstract record available.
Inventors
- 👤 Raymond L Rulison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:29
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/10; H10W74/131; Y; Y10; Y10S; Y10S134/00; Y10S134/902; Y10S438/00; Y10S438/974
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
THE METHOD OF ALTERING THE ELECTRICAL CHARACTERISTICS OF A GERMANIUM BODY WHICH COMPRISES IMMERSING SAID BODY IN A SOLUTION COMPOSED ESSENTIALLY OF ONE PART BY VOLUME OF A COMPOUND OF POLYETHYLENE AND POLYISOBUTYLENE IN FORTY PARTS BY VOLUME OF CARBON TETRACHLORIDE, HEATING SAID SOLUTION AT THE BOILING POINT FOR A PERIOD OF THE ORDER OF TEN MINUTES, AND REMOVING SAID BODY FROM SAID SOLUTION.
Claim 2
Independent Claim
64 words
THE METHOD OF ALTERING THE ELECTRICAL CHARACTERISTICS OF A GERMANIUM BODY WHICH COMPRISES IMMERSING SAID BODY IN A SOLUTION COMPOSED ESSENTIALLY OF ONE PART BY VOLUME OF A COMPOUND OF POLYETHYLENE AND POLYISOBUTYLENE IN FORTY PARTS BY VOLUME OF CARBON TETRACHLORIDE, HEATING SAID SOLUTION AT THE BOILING POINT FOR A PERIOD OF THE ORDER OF TEN MINUTES, AND REMOVING SAID BODY FROM SAID SOLUTION.
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) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |