Patent US2881371A successfully refreshed from Google Patents.
US2881371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transmission
Assignee: Vickers Inc
•
Filing: 1957-05-23
•
Granted: 1959-04-07
•
Expires: 1977-05-23
Abstract
No abstract record available.
Inventors
- 👤 Paul N Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:34
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/01; H10D48/04; H10D48/043; H10D48/046; H10P; H10P14/00; H10P14/20; H10P14/22; H10P14/26; H10P14/263; H10P14/34; H10P14/3402; H10P14/38; H10P14/3802
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A BLOCKING LAYER DEVICE COMPRISING: A SELENIUM SURFACE; A LAYER ON SAID SURFACE FORMED BY EXPOSING SAID SURFACE TO THE VAPOR OF A METALLIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE SEMICONDUCTING, VAPOR-DEPOSITABLE, METALLIC SULFIDES, METALLIC SELENIDES, METALLIC TELLURIDES, AND EACH OF THE THREE LAST MENTIONED SUBGROUPS IN
Claim 2
Dependent Claim
49 words
A BLOCKING LAYER DEVICE COMPRISING: A SELENIUM SURFACE; A LAYER ON SAID SURFACE FORMED BY EXPOSING SAID SURFACE TO THE VAPOR OF A METALLIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE SEMICONDUCTING, VAPOR-DEPOSITABLE, METALLIC SULFIDES, METALLIC SELENIDES, METALLIC TELLURIDES, AND EACH OF THE THREE LAST MENTIONED SUBGROUPS IN
References Cited (Backward Citations)
US2554237A
Cited
US2496692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |