US4743508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grindstone-polymer composite for super colloid mill and manufacturing method thereof
Assignee: Individual
•
Filing: 1986-03-17
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Granted: 1988-05-10
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Expires: 2006-03-17
Abstract
Abstract A grindstone-polymer composite for a super colloid mill characterized in that, in the inner void pores of the porous vitrified grindstone for the super colloid mill, thermoplastic and thermosetting polymers are allowed to fill the void pores of the wall surface within a range of 30 to 60% of total volume of void pores in said grindstone so that 70 to 40% of void pores in the grindstone for the super colloid mill remain and the volume fraction Vp thereof lies within a range of 0.09 to 0.21.
Inventors
- 👤 Tsuneo Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:03
CPC Classifications
B; B02; B02C; B02C7/00; B02C7/11; B02C7/12; Y; Y10; Y10T; Y10T428/00; Y10T428/30; Y10T428/4935
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
91 words
A grindstone-polymer composite for a super colloid mill characterized in that, in the inner void pores of a porous vitrified grindstone for a super colloid mill, thermoplastic and thermosetting polymers are allowed to grow and to fill up the wall surface of the void pores within a range of 30 to 60% of total volume of void pores in said grindstone so as 70 to 40% of void pores in the grindstone for super colloid mill remain and the volume fraction Vp thereof lies within a range of 0.09 to 0.21.
Claim 2
Dependent Claim
91 words
A grindstone-polymer composite for a super colloid mill characterized in that, in the inner void pores of a porous vitrified grindstone for a super colloid mill, thermoplastic and thermosetting polymers are allowed to grow and to fill up the wall surface of the void pores within a range of 30 to 60% of total volume of void pores in said grindstone so as 70 to 40% of void pores in the grindstone for super colloid mill remain and the volume fraction Vp thereof lies within a range of 0.09 to 0.21.
Claim 3
Dependent Claim
10 words
The grindstone-polymer of claim 1, wherein the polymer comprises polymethylmethacrylate.
Claim 4
Dependent Claim
13 words
The grindstone-polymer composite of claim 2, wherein the polymethylmethacrylate is mixed with styrene.
References Cited (Backward Citations)
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US3216854A
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US3650804A
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US4013809A
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US4125637A
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US4539233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |