US4559373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weldable sealants for metal and method of use
Assignee: WR Grace and Co Conn
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Filing: 1983-07-18
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Granted: 1985-12-17
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Expires: 2003-07-18
Abstract
Abstract A weldable sealant composition is made by adding ferrous metal particles to a sealant having a viscosity of at least 6 million centipoises. The sealant composition is placed between two metal plates and permits resistance welding, i.e. spot welding, to take place.
Inventors
- 👤 James L. Guthrie
- 👤 Helen F. Roberts
- 👤 Christian B. Lundsager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:47
CPC Classifications
C; C09; C09J; C09J201/00; B; B23; B23K; B23K11/00; B23K11/10; B23K11/11; B23K11/34; C09J5/00; C09J5/06; C08; C08L; C08L2666/00; C08L2666/54
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
162 words
A weldable sealant composition suitable for use as a sealant for the purpose of filling space between two pieces of steel to be welded comprising an admixture of a malleable sealant having a visosity of from between 6 million to 50 million centipoises at 25° C., said sealant being present in an amount of 60-99% by weight of said admixture, and a weldably effective amount of ferrous metal particles dispersed in said sealant, said particles being present in an amount of from about 1 to 40% by weight and having a particle size smaller than 100 mesh, said sealant composition being capable upon being heated to a temperature of at least 80° C. of softening to form a bead which adheres to the steel surface to be sealed and said adhered sealant composition upon returning to ambient conditions being capable of flowing when squeezed by a stationary welding machine to allow said steel pieces to approach each other sufficiently to be welded.
Claim 2
Dependent Claim
162 words
A weldable sealant composition suitable for use as a sealant for the purpose of filling space between two pieces of steel to be welded comprising an admixture of a malleable sealant having a visosity of from between 6 million to 50 million centipoises at 25° C., said sealant being present in an amount of 60-99% by weight of said admixture, and a weldably effective amount of ferrous metal particles dispersed in said sealant, said particles being present in an amount of from about 1 to 40% by weight and having a particle size smaller than 100 mesh, said sealant composition being capable upon being heated to a temperature of at least 80° C. of softening to form a bead which adheres to the steel surface to be sealed and said adhered sealant composition upon returning to ambient conditions being capable of flowing when squeezed by a stationary welding machine to allow said steel pieces to approach each other sufficiently to be welded.
Claim 3
Dependent Claim
27 words
A composition according to claim 1, wherein said ferrous metal particles are selected from the group consisting of iron, steel, stainless steel, nickel, cobalt, and mixtures thereof.
Claim 4
Dependent Claim
13 words
A composition according to claim 2, wherein said ferrous metal particle is iron.
Claim 5
Dependent Claim
24 words
A composition according to claim 1, wherein said ferrous metal particles have a particle size ranging from about 100 mesh to about 325 mesh.
Claim 6
Dependent Claim
19 words
A composition according to claim 4, wherein there are additional ferrous metal particles having particles smaller than 325 mesh.
Claim 7
Dependent Claim
24 words
A composition according to claim 3, wherein said ferrous metal particles are present in an amount of from about 1 to 10% by weight.
Claim 8
Dependent Claim
36 words
A composition according to claim 1, wherein said sealant is an epoxy-pendant, urethane-containing compound which is the reaction product of an epoxy resin containing more than one hydroxyl group, one or more diols and a polyisocyanate.
Claim 9
Dependent Claim
20 words
A composition according to claim 1, wherein said sealant has a viscosity of from about 10 to 30 million centipoises.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |