Patent US2858075A successfully refreshed from Google Patents.
Patent US2266935A successfully refreshed from Google Patents.
Patent US2840685A successfully refreshed from Google Patents.
US2840685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electrowelding and products made thereby
Assignee: K SCHWEISSWERK HALLE VEB
•
Filing: 1955-11-09
•
Granted: 1958-06-24
•
Expires: 1975-11-09
Abstract
No abstract record available.
Inventors
- 👤 Muller Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:40
CPC Classifications
B; B23; B23K; B23K25/00; B23K9/00; B23K9/02; B23K9/038
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A METHOD OF WELDING WITH AN ENTIRELY COVERED OR SUBSTANTIALLY COVERED ELECTRIC ARC ON FERROUS BASE PIECES, PARTICULARLY CAST IRON CHILLED ROLLERS AND WOBBLERS, SAID METHOD COMPRISING THE STEPS OF PREHEATING A WELDING AREA OF THE CAST IRON BASE TO 600*-700*C., APPLYING A LAYER OF LIQUEFIED SLAG-POWDER OF A MELTING POINT BELOW THAT OF THE CAST IRON BASE TO SAID PREHEATED WELDING AREA, INSERTING AN ARC-PRODUCING ELECTRODE COMPRISING CAST IRON METAL IN SAID SLAG BATH, AND THEN INITIATING THE ARC CASTING BY HIRING AN ELECTRIC ARC BETWEEN SAID METAL ELECTRODE AND THE WORK PIECE, SAID LIQUID SLAG LAYER BEING MAINTAINED DURING THE ENTIRE WELDING PROCESS WITHOUT WITHDRAWING ANY OF SAID SLAG.
Claim 2
Independent Claim
111 words
A METHOD OF WELDING WITH AN ENTIRELY COVERED OR SUBSTANTIALLY COVERED ELECTRIC ARC ON FERROUS BASE PIECES, PARTICULARLY CAST IRON CHILLED ROLLERS AND WOBBLERS, SAID METHOD COMPRISING THE STEPS OF PREHEATING A WELDING AREA OF THE CAST IRON BASE TO 600*-700*C., APPLYING A LAYER OF LIQUEFIED SLAG-POWDER OF A MELTING POINT BELOW THAT OF THE CAST IRON BASE TO SAID PREHEATED WELDING AREA, INSERTING AN ARC-PRODUCING ELECTRODE COMPRISING CAST IRON METAL IN SAID SLAG BATH, AND THEN INITIATING THE ARC CASTING BY HIRING AN ELECTRIC ARC BETWEEN SAID METAL ELECTRODE AND THE WORK PIECE, SAID LIQUID SLAG LAYER BEING MAINTAINED DURING THE ENTIRE WELDING PROCESS WITHOUT WITHDRAWING ANY OF SAID SLAG.
References Cited (Backward Citations)
USRE19764E
Cited
US1416879A
Cited
US1679518A
Cited
US1630631A
Cited
US1782316A
Cited
US2125172A
Cited
US2219352A
Cited
US2299747A
Cited
US2227193A
Cited
US2277654A
Cited
US2241572A
Cited
US2330289A
Cited
US2395723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |