Patent US3768984A successfully refreshed from Google Patents.
US3768984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding rods
Assignee: Individual
•
Filing: 1972-04-03
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Granted: 1973-10-30
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Expires: 1992-04-03
Abstract
Abstract A gas applied carbide weld rod is provided which is made up of a mild steel tube filled with a mixture of about 65 to 70% of 20-60 mesh W2C, about 20% to 25% of 80-200 mesh Macro WC, about 9% to 12% of 80-200 mesh Sintered WC and about 1.0% to 1.5% of flux.
Inventors
- 👤 J Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:00
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/02; B23K35/0255; B23K35/0261; B23K35/0266; B23K35/22; B23K35/24; B23K35/32; B23K35/327; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12097; Y10T428/12104; Y10T428/12111
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
26 words
A gas applied welding rod as claimed in claim 1 wherein the flux is selected from the group consisting of silico manganese, molasses and mixtures thereof.
Claim 2
Dependent Claim
33 words
A gas applied welding rod as claimed in claim 1 wherein the ratio of steel to tungsten carbide in the rod is about 57.5% to 62.5% steel to about 42.5% to 37.5% carbide.
Claim 3
Dependent Claim
95 words
A gas applied welding rod as claimed in claim 1 wherein the mild steel tube is filled with a mixture consisting essentially of about 67% by weight of 30-40 mesh W2C, about 21.5% of 100-160 mesh single large grains of WC formed by combining W and C in the first phase of making WC by reacting WO3 with carbon in an electric furnace, about 10.2% of 100-160 mesh crushed sintered WC scrap carbide having 3.5 to 8% cobalt matrix with the balance 0.75 to 6.0 micron grain size WC carbide and about 1.3% silico manganese.
Claim 4
Dependent Claim
24 words
A gas applied welding rod as claimed in claim 4 wherein the ratio of steel to carbide is about 60% steel to 40% carbide.
Claim 5
Dependent Claim
106 words
A gas applied welding rod as claimed in claim 1 wherein a mild steel tube is filled with a mixture consisting essentially of about 65% to 70% by weight of 20-60 mesh W2C, about 20% to 25% by weight of 80-200 mesh single large grains of WC formed by combining W and C in the first phase of making WC by reacting WO3 with carbon in an electric furnace, about 9% to 12% by weight of 80-200 mesh crushed sintered WC scrap carbide having 3.5 to 8% cobalt matrix with the balance 0.75 to 6.0 micron grain size WC carbide and about 1.0 to 1.5% flux.
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |