US3720805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the manufacture of composite electrical contacts
Assignee: Johnson Matthey Ltd
•
Filing: 1971-11-04
•
Granted: 1973-03-13
•
Expires: 1991-11-04
Abstract
Abstract A WELDED COMPOSITE FORMED BY CUTTING AND HEATING CONTINUOUS LENGTHS OF WIRE AND IMMEDIATELY TRANSFERRING THE LENGTHS TO A DIE WHERE THE LENGTHS ARE JOINED BY PRESSING AT HIGH PRESSURE AND THE JOINED LENGTHS ARE THEN FORCED AT LEAST A PORTION OF THE WAY OUT OF THE DIE WHERE HEADING OPERATIONS ARE PERFORMED.
Inventors
- 👤 W Fitzgerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:57
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/02; B21; B21K; B21K1/00; B21K1/58; B21K1/62; B23K2103/00; B23K2103/16; B23K2103/166; B23K2103/172; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |