US2432631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electric welding metals of different electrical resistivities
Assignee: AT&T Inc
•
Filing: 1945-07-28
•
Granted: 1947-12-16
•
Expires: 1965-07-28
Abstract
No abstract record available.
Inventors
- 👤 Robert W Rosendale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:06
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/16; B23K11/20; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49833; Y10T29/49945; Y10T428/00; Y10T428/12; Y10T428/12486; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/12917
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1064338A
Cited
US1123309A
Cited
US1332394A
Cited
DE404923C
Cited
US1973986A
Cited
US2151758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-15 | 1951-06-16 | 1951-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-15 | 1955-06-16 | 1955-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-15 | 1959-06-16 | 1959-12-16 | $7700.00 | Window Closed / Lapsed |