US4937995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noninvasively identifiable membrane roof system
Assignee: Carlisle Management Co
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Filing: 1988-06-16
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Granted: 1990-07-03
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Expires: 2008-06-16
Abstract
Abstract To indicate the origin of manufacture of the components of a roofing system, magnetically permeable particles are incorporated into the components. The particles are preferably loaded into the lap sealant and adhesive used to form field splices. Thus loaded, the lap sealant and/or adhesive has magnetically permeable properties or characteristics which are electromagnetically detectable through and beyond one layer of rubber sheeting. Detection of these particles provides an indication of origin of the material.
Inventors
- 👤 Robert J. Deffeyes
- 👤 William A. Manly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:53
CPC Classifications
G; G09; G09F; G09F3/00; B; B29; B29C; B29C65/00; B29C65/48; B29C65/82; B29C65/8269; B29C65/8284; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C65/4805; B29C65/481; B29C65/483; B29C66/70; B29C66/71; B29C66/90; B29C66/96; B29C66/967; B29C66/9672; B29L; B29L2031/00; B29L2031/10; B29L2031/108
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
73 words
A noninvasively identifiable roof system comprising: a plurality of water impermeable membrane sheets sealed at overlapping edges thereof by lap sealant and adhesive to form one continuous water impervious membrane; magnetically permeable particles incorporated into at least one component part of said roof system selected from the group consisting of said adhesive, said lap sealant and said membrane sheets, said particles incorporated in sufficient quantity and distribution so as to be electromagnetically detectable.
Claim 2
Dependent Claim
73 words
A noninvasively identifiable roof system comprising: a plurality of water impermeable membrane sheets sealed at overlapping edges thereof by lap sealant and adhesive to form one continuous water impervious membrane; magnetically permeable particles incorporated into at least one component part of said roof system selected from the group consisting of said adhesive, said lap sealant and said membrane sheets, said particles incorporated in sufficient quantity and distribution so as to be electromagnetically detectable.
Claim 3
Dependent Claim
24 words
A noninvasively identifiable roof system as in claim 1 wherein said magnetically permeable particles are applied onto said membrane sheets at regularly spaced intervals.
Claim 4
Dependent Claim
63 words
A noninvasively identifiable roof system as in claim 1 wherein said magnetically permeable particles are incorporated into at least two of said roofing components, a first quantity of magnetic particles incorporated into one of said roof components and a second quantity of particles incorporated into a second component, said first and second quantities being different to render said incorporated roof components noninvasively distinguishable.
Claim 5
Dependent Claim
32 words
A noninvasively identifiable roof system as in claim 3 wherein said adhesive and said lap sealant are loaded with different quantities of said magnetically permeable particles so as to be noninvasively distinguishable.
Claim 6
Dependent Claim
47 words
A noninvasively identifiable roof system as in claim 1 wherein said particles are incorporated in sufficient quantity and distribution into at least one of said component parts so as to produce a detectable effect on magnetic flux when a magnetic field is directed proximate said component parts.
Claim 7
Dependent Claim
19 words
A noninvasively identifiable roof system as in claim 5 wherein said magnetically permeable particles are incorporated into said adhesive.
Claim 8
Dependent Claim
30 words
A noninvasively identifiable roof system as in claim 6 wherein said particles are incorporated into said adhesive at about 5% by volume of the total volume of non-volatile solids therein.
Claim 9
Dependent Claim
20 words
A noninvasively identifiable roof system as in claim 6 wherein said particles have a size of up to 350 mesh.
Claim 10
Dependent Claim
16 words
A noninvasively identifiable roof system as in claim 6 wherein said particles are nickel zinc ferrite.
Claim 11
Dependent Claim
18 words
A roof system as in claim 2 wherein said magnetically permeable particles are incorporated into said lap sealant.
Claim 12
Dependent Claim
30 words
A noninvasively identifiable roof system as in claim 10 wherein said particles are incorporated into said sealant at about 5%, by volume of the total volume of non-volatile solids therein.
Claim 13
Dependent Claim
20 words
A noninvasively identifiable roof system as in claim 10 wherein said particles have a size of up to 350 mesh.
Claim 14
Dependent Claim
16 words
A noninvasively identifiable roof system as in claim 10 wherein said particles are nickel zinc ferrite.
Claim 15
Independent Claim
61 words
A method of forming a roof system in which the origin of manufacture of component parts thereof is noninvasively detectable, comprising the step of: incorporating magnetically permeable particles into one component part selected from the group consisting of said adhesive, said lap sealant and said membrane sheets, said particles incorporated in sufficient quantity and distribution so as to be electromagnetically detectable.
Claim 16
Independent Claim
61 words
A method of forming a roof system in which the origin of manufacture of component parts thereof is noninvasively detectable, comprising the step of: incorporating magnetically permeable particles into one component part selected from the group consisting of said adhesive, said lap sealant and said membrane sheets, said particles incorporated in sufficient quantity and distribution so as to be electromagnetically detectable.
Claim 17
Dependent Claim
46 words
The method as in claim 14 wherein said magnetically permeable particles are incorporated into one of said component parts selected from the group consisting of said lap sealant and said adhesive, said particles approximating about 5%, by volume of the total volume of non-volatile solids therein.
Claim 18
Dependent Claim
14 words
A method as in claim 15 wherein said incorporated particles are nickel zinc ferrite.
Claim 19
Independent Claim
80 words
A method of forming a roof system in which the origin of manufacture of component parts thereof is noninvasively detectable, comprising the step of: sealing a plurality of water impermeable membrane sheets at overlapping edges thereof by lap sealant and adhesive to form one continuous water impervious membrane to cover said roof deck, at least one of said lap sealant and said adhesive having magnetically permeable particles incorporated therein in sufficient number and distribution so as to be electromagnetically detectable.
Claim 20
Independent Claim
80 words
A method of forming a roof system in which the origin of manufacture of component parts thereof is noninvasively detectable, comprising the step of: sealing a plurality of water impermeable membrane sheets at overlapping edges thereof by lap sealant and adhesive to form one continuous water impervious membrane to cover said roof deck, at least one of said lap sealant and said adhesive having magnetically permeable particles incorporated therein in sufficient number and distribution so as to be electromagnetically detectable.
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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) | 1993-07-02 | 1994-01-01 | 1994-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-02 | 1998-01-01 | 1998-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-02 | 2002-01-01 | 2002-07-03 | $7700.00 | Window Closed / Lapsed |