Patent US4849273A successfully refreshed from Google Patents.
US4849273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding blanket
Assignee: 3M Co
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Filing: 1987-04-24
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Granted: 1989-07-18
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Expires: 2007-04-24
Abstract
Abstract A welding blanket comprising a layer of flexible protective material comprising unexpanded vermiculite and inorganic heat resistant fibrous material, which layer undergoes localized expansion in a direction normal to its major surfaces when contacted by spatter of molten metal during a welding process; and two relatively thin flexible cover sheets, one attached along each of the major surfaces of the layer of flexible material to maintain its structural integrity.
Inventors
- 👤 Mark C. Skinner
- 👤 Thomas W. Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:28
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/32; B32; B32B; B32B7/00; B32B7/04; B32B7/12; B23K35/00; B23K35/22; B23K35/224; B32B19/00; B32B19/04; B32B19/043; B32B19/045; B32B19/06; B32B25/00; B32B25/16; B32B27/00; B32B27/30; B32B27/32; B32B27/34; B32B27/36; B32B5/00; B32B5/02; B32B5/022; B32B5/024; B32B2571/00; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/24; Y10T428/24033
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
A welding blanket for protecting a surface from the spatter of molten metal during a welding process, said welding blanket comprising a layer of flexible protective material having opposite major surfaces and comprising unexpanded vermiculite and inorganic heat resistance fibrous material, which layer of flexible protective material undergoes localized expansion in a direction normal to said surfaces when contacted by spatter of molten metal during a welding process to restrict embedding of the spatter in the blanket so that the spatter globules will fall off or can be easily brushed off of the blanket; and two relatively thin flexible cover sheets, one attached along each of said major surfaces.
Claim 2
Dependent Claim
109 words
A welding blanket for protecting a surface from the spatter of molten metal during a welding process, said welding blanket comprising a layer of flexible protective material having opposite major surfaces and comprising unexpanded vermiculite and inorganic heat resistance fibrous material, which layer of flexible protective material undergoes localized expansion in a direction normal to said surfaces when contacted by spatter of molten metal during a welding process to restrict embedding of the spatter in the blanket so that the spatter globules will fall off or can be easily brushed off of the blanket; and two relatively thin flexible cover sheets, one attached along each of said major surfaces.
Claim 3
Dependent Claim
15 words
A welding blanket according to claim 1 wherein said cover sheets are of combustible material.
Claim 4
Dependent Claim
29 words
A welding blanket according to claim 1 wherein said layer of flexible protective material contains in the range of 30 to 85 percent by weight of the unexpanded vermiculite.
Claim 5
Dependent Claim
20 words
A welding blanket according to claim 1 wherein said layer of flexible protective material is over about 0.1 centimeter thick.
Claim 6
Dependent Claim
23 words
A welding blanket according to claim 1 wherein said cover sheets are attached to said layer of flexible protective material by an adhesive.
Claim 7
Dependent Claim
125 words
A welding blanket for protecting a surface from the spatter of molten metal during a welding process, said welding blanket comprising a layer of flexible protective material having opposite major surfaces and comprising unexpanded vermiculite and inorganic heat resistant fibrous material, which layer of flexible protective material undergoes localized expansion in a direction normal to said surfaces when contacted by spatter of molten metal during a welding process to restrict embedding of the spatter in the blanket so that the spatter globules will fall off or can be easily brushed off of the blanket; and two relatively thin flexible cover sheets, one attached along each of said major surfaces, said cover sheets being attached to said layer of flexible protective material by a stitch bonding.
Claim 8
Dependent Claim
125 words
A welding blanket for protecting a surface from the spatter of molten metal during a welding process, said welding blanket comprising a layer of flexible protective material having opposite major surfaces and comprising unexpanded vermiculite and inorganic heat resistant fibrous material, which layer of flexible protective material undergoes localized expansion in a direction normal to said surfaces when contacted by spatter of molten metal during a welding process to restrict embedding of the spatter in the blanket so that the spatter globules will fall off or can be easily brushed off of the blanket; and two relatively thin flexible cover sheets, one attached along each of said major surfaces, said cover sheets being attached to said layer of flexible protective material by a stitch bonding.
Claim 9
Dependent Claim
123 words
A welding blanket for protecting a surface from the spatter of molten metal during a welding process, said welding blanket comprising a layer of flexible protective material having opposite major surfaces and comprising unexpanded vermiculite and inorganic heat resistant fibrous material, which layer of flexible protective material undergoes localized expansion in a direction normal to said surfaces when contacted by spatter of molten metal during a welding process to restrict embedding of the spatter in the blanket so that the spatter globules will fall off or can be easily brushed off of the blanket; and two relatively thin flexible cover sheets, one attached along each of said major surfaces, said cover sheets being attached to said layer of flexible protective material by sewing.
Claim 10
Dependent Claim
123 words
A welding blanket for protecting a surface from the spatter of molten metal during a welding process, said welding blanket comprising a layer of flexible protective material having opposite major surfaces and comprising unexpanded vermiculite and inorganic heat resistant fibrous material, which layer of flexible protective material undergoes localized expansion in a direction normal to said surfaces when contacted by spatter of molten metal during a welding process to restrict embedding of the spatter in the blanket so that the spatter globules will fall off or can be easily brushed off of the blanket; and two relatively thin flexible cover sheets, one attached along each of said major surfaces, said cover sheets being attached to said layer of flexible protective material by sewing.
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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |