US4325849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making a slurry containing particulate matter and fibers for a preformed insulation product
Assignee: Celotex Corp
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Filing: 1980-08-08
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Granted: 1982-04-20
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Expires: 2000-08-08
Abstract
Abstract A method for making a slurry containing particulate matter and fibers for a preformed insulation product comprises mixing dry particulate matter with a binder which is a liquid containing dispersed fibers. An apparatus suitable for practicing the method comprises a means for disposing the particulate matter in the form of a falling curtain and a means for spraying the binder on the particulate matter.
Inventors
- 👤 Murray Rosen
- 👤 Alan R. Koenig
- 👤 John D. Copham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:42
CPC Classifications
B; B28; B28B; B28B17/00; B28B17/02; B01; B01F; B01F29/00; B01F29/25; B01F29/40; B01F29/403; B01F29/4033; B01F29/60; B01F29/61; B01F29/63; B29; B29B; B29B7/00; B29B7/80; B29B7/88; B29B7/90; B29B7/905
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
A method for making a slurry containing particulate matter, binder and fibers for a preformed insulation product comprising making a liquid binder, putting in chopped strands of fibers into said liquid binder, agitating said liquid binder to separate at least some of said strands into individual fibers, forcing said liquid binder and fibers under pressure through a hollow tubular member against an inwardly closing helical vane to form a conically expanding spray of binder and fibers breaking up any remaining strands of fibers into individual fibers, forming a falling curtain of separated particulate matter and directing said conically expanding spray of binder and fibers against said falling curtain of separated particulate matter to form a uniform slurry of particles, binder and fibers.
Claim 2
Independent Claim
122 words
A method for making a slurry containing particulate matter, binder and fibers for a preformed insulation product comprising making a liquid binder, putting in chopped strands of fibers into said liquid binder, agitating said liquid binder to separate at least some of said strands into individual fibers, forcing said liquid binder and fibers under pressure through a hollow tubular member against an inwardly closing helical vane to form a conically expanding spray of binder and fibers breaking up any remaining strands of fibers into individual fibers, forming a falling curtain of separated particulate matter and directing said conically expanding spray of binder and fibers against said falling curtain of separated particulate matter to form a uniform slurry of particles, binder and fibers.
Claim 3
Dependent Claim
24 words
A method for making a slurry containing particulate matter, binder and fibers as recited in claim 1 in which said particulate matter is perlite.
Claim 4
Dependent Claim
23 words
A method of making a slurry containing particulate matter, binder and fibers as recited in claim 1, in which said fibers are nylon.
References Cited (Backward Citations)
US2282479A
Cited
US2644772A
Cited
US2741545A
Cited
US3092489A
Cited
US3227789A
Cited
US3232703A
Cited
US3390648A
Cited
US3285223A
Cited
US3398191A
Cited
US3408316A
Cited
US3295950A
Cited
US3342577A
Cited
US3684558A
Cited
US3558591A
Cited
US3573966A
Cited
US3903333A
Cited
US3967005A
Cited
US3991225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-19 | 1985-10-19 | 1986-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-19 | 1989-10-19 | 1990-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-19 | 1993-10-19 | 1994-04-20 | $7700.00 | Window Closed / Lapsed |