Patent US4735734A successfully refreshed from Google Patents.
US4735734A
Expired / Lapsed
US
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Process for preparing suspensions of solid lubricants
Assignee: Lonza AG
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Filing: 1986-09-23
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Granted: 1988-04-05
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Expires: 2006-09-23
Abstract
Abstract Solid lubricants which are used in the non-cutting hot forming of metals. Lubricants containing graphite and polymers are presuspended in a colloid mill in water as a carrier liquid and immediately thereafter are subjected to a further mixing process in an intensive mixer, thereby being processed to a stable suspension.
Inventors
- 👤 Hans-Rudolf Staub
- 👤 Hansjorg Furrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:47
CPC Classifications
B; B01; B01F; B01F33/00; B01F33/80; B01F33/82; B01F33/821
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
135 words
Process for preparing a suspension of at least one solid lubricant, which is used in the non-cutting hot-forming of metals, said lubricant containing graphite and at least one polymer in water as a carrier liquid, comprising suspending the constituents of the solid lubricant in the water in a colloid mill, said suspension having a solid lubricant content of 1 to 70 weight percent, said suspension containing 1 to 90 weight percent of graphite and 1 to 50 weight percent of at least one polymer and, water being present as a carrier liquid in an amount at least sufficient to allow said suspension of at least one solid lubricant to be formed, and immediately afterward are subjecting said suspension to a further mixing process in an intensive mixer, thereby processing said suspension to a stable suspension.
Claim 2
Dependent Claim
135 words
Process for preparing a suspension of at least one solid lubricant, which is used in the non-cutting hot-forming of metals, said lubricant containing graphite and at least one polymer in water as a carrier liquid, comprising suspending the constituents of the solid lubricant in the water in a colloid mill, said suspension having a solid lubricant content of 1 to 70 weight percent, said suspension containing 1 to 90 weight percent of graphite and 1 to 50 weight percent of at least one polymer and, water being present as a carrier liquid in an amount at least sufficient to allow said suspension of at least one solid lubricant to be formed, and immediately afterward are subjecting said suspension to a further mixing process in an intensive mixer, thereby processing said suspension to a stable suspension.
Claim 3
Dependent Claim
23 words
Process according to claim 1 wherein the dry premixed constituents of the solid lubricant and water are brought together in the colloid mill.
Claim 4
Dependent Claim
21 words
Process according to claim 1 wherein the graphite and the polymer premixed in the water are fed into the colloid mill.
Claim 5
Dependent Claim
17 words
Process according to claim 3 wherein the colloid mill exhibits a clearance of 0.01 to 3 mm.
Claim 6
Dependent Claim
20 words
Process according to claim 4 wherein the colloid mill is operated with a peripheral speed of 10 to 40 m/sec.
Claim 7
Dependent Claim
23 words
Process according to claim 5 wherein the residence time of the material being mixed in the intensive mixer is 60 to 3000 sec.
Claim 8
Dependent Claim
17 words
Process according to claim 1 wherein the colloid mill exhibits a clearance of 0.01 to 3 mm.
Claim 9
Dependent Claim
20 words
Process according to claim 1 wherein the colloid mill is operated with a peripheral speed of 10 to 40 m/sec.
Claim 10
Dependent Claim
20 words
Process according to claim 1 wherein the colloid mill is operated with a peripheral speed of 15 to 20 m/sec.
Claim 11
Dependent Claim
23 words
Process according to claim 1 wherein the residence time of the material being mixed in the intensive mixer is 60 to 3000 sec.
Claim 12
Dependent Claim
23 words
Process according to claim 1 wherein the residence time of the material being mixed in the intensive mixer is 150 to 300 sec.
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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) | 1991-04-05 | 1991-10-05 | 1992-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-05 | 1995-10-05 | 1996-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-05 | 1999-10-05 | 2000-04-05 | $7700.00 | Window Closed / Lapsed |