Patent US4304708A successfully refreshed from Google Patents.
US4304708A
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Process for the manufacture of stable polyol-filler dispersions
Assignee: BASF SE
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Filing: 1981-01-27
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Granted: 1981-12-08
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Expires: 2001-01-27
Abstract
Abstract This invention relates to a process for the manufacture of stable polyol-filler dispersions. The polyol-filler dispersions are prepared by the crushing of fillers in situ in polyols employing high localized energies.
Inventors
- 👤 Matthias Marx
- 👤 Dietmar Nissen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:28
CPC Classifications
C; C09; C09D; C09D17/00; C09D17/004; C08; C08K; C08K3/00; C08K3/01; C08K3/013; C08K9/00; C08K9/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
32 words
A process for the manufacture of stable polyol filler dispersions wherein the fillers in polyols are crushed with high localized energy densities in situ to particle sizes of less than 7 microns.
Claim 2
Dependent Claim
32 words
A process for the manufacture of stable polyol filler dispersions wherein the fillers in polyols are crushed with high localized energy densities in situ to particle sizes of less than 7 microns.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the localized energy densitites are 10 to 3000 kilowatt hours per cubic meter.
Claim 4
Dependent Claim
22 words
The process of claim 1 wherein the polyols have molecular weights of 200 to 8000 and hydroxyl numbers of 20 to 600.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein polyethers having molecular weights of 800 to 6000 are used as polyols.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein inorganic fillers are used as filler materials.
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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) | 1984-12-07 | 1985-06-08 | 1985-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-07 | 1989-06-08 | 1989-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-07 | 1993-06-08 | 1993-12-08 | $7700.00 | Window Closed / Lapsed |