Patent US4325849A successfully refreshed from Google Patents.
US4325849A
Expired / Lapsed
US
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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 06:56
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.
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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) | 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 |