US2753497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal contact rectifiers
Assignee: Siemens Mobility Ltd
•
Filing: 1952-06-30
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Granted: 1956-07-03
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Expires: 1972-06-30
Abstract
No abstract record available.
Inventors
- 👤 Jenkins Alexander
- 👤 Langridge Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:54
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/40; H10W72/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A CRYSTAL CONTACT RECTIFIER COMPRISING A TUBULAR CASING OF INSULATING MATERIAL; A FIRST END CAP CLOSING OUT ENDS OF SAID CASING; A SECOND END CAP CLOSING THE OUTER END OF SAID CASING; A SEMI-CONDUCTING CRYSTAL MOUNTED ON SAID FIRST END CAP AND WITHIN THE CASING; A BALL POINTED CAT''S-WHISKER SECURED TO SAID SECOND END CAP AND WITH THE BALL POINT IN CONTACT WITH A SURFACE OF SAID CRYSTAL; A LAYER OF INSULATING MATERIAL COVERING SAID BALL POINT AND
Claim 2
Dependent Claim
78 words
A CRYSTAL CONTACT RECTIFIER COMPRISING A TUBULAR CASING OF INSULATING MATERIAL; A FIRST END CAP CLOSING OUT ENDS OF SAID CASING; A SECOND END CAP CLOSING THE OUTER END OF SAID CASING; A SEMI-CONDUCTING CRYSTAL MOUNTED ON SAID FIRST END CAP AND WITHIN THE CASING; A BALL POINTED CAT''S-WHISKER SECURED TO SAID SECOND END CAP AND WITH THE BALL POINT IN CONTACT WITH A SURFACE OF SAID CRYSTAL; A LAYER OF INSULATING MATERIAL COVERING SAID BALL POINT AND
References Cited (Backward Citations)
US756676A
Cited
US962262A
Cited
US1670589A
Cited
US2406405A
Cited
US2430028A
Cited
US2432116A
Cited
US2475940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-03 | 1960-01-02 | 1960-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-03 | 1964-01-02 | 1964-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-03 | 1968-01-02 | 1968-07-03 | $7700.00 | Window Closed / Lapsed |