US2760256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical contacts
Assignee: Individual
•
Filing: 1953-02-11
•
Granted: 1956-08-28
•
Expires: 1973-02-11
Abstract
No abstract record available.
Inventors
- 👤 Linwood T Richardson
- 👤 Merle R Swinehart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:31
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/023; H01H1/0237; H01H1/02372; H01H1/02374
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
AN ELECTRICAL CONTACT IN THE FORM OF A BONDED MASS OF POWDERS COMPOSED OF A MIXTURE OF FROM SEVENTY-FIVE TO NINETY-THREE PERCENT BY WEIGHT OF SILVER POWDER, FROM FIVE AND THREE-FOURTHS TO TWENTY-THREE AND THREE-FOURTHS PERCENT BY WEIGHT OF CADIUM OXIDE, AND FROM APPROXIMATELY ONE AND ONE-FOURTH PERCENT UP TO FIVE PERCENT BY WEIGHT OF COBALT SULPHATE.
Claim 2
Dependent Claim
57 words
AN ELECTRICAL CONTACT IN THE FORM OF A BONDED MASS OF POWDERS COMPOSED OF A MIXTURE OF FROM SEVENTY-FIVE TO NINETY-THREE PERCENT BY WEIGHT OF SILVER POWDER, FROM FIVE AND THREE-FOURTHS TO TWENTY-THREE AND THREE-FOURTHS PERCENT BY WEIGHT OF CADIUM OXIDE, AND FROM APPROXIMATELY ONE AND ONE-FOURTH PERCENT UP TO FIVE PERCENT BY WEIGHT OF COBALT SULPHATE.
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) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |