US Patent No: 8,051,678
Number of patents in Portfolio can not be more than 2000
Press molding method for manufacturing of glass substrate
Stats
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Nov 8, 2011
Issued date -
Apr 16, 2004
filing date -
10/825,178
serial no -
In Force
status
Importance
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Abstract
The present invention relates to a glass substrate of which the outer periphery portion is unprocessed. The present invention also relates to a manufacturing method for a glass substrate of which the outer periphery portion is unprocessed, characterized in that a first lapping process, a second lapping process, a polishing process and a washing process are carried out after a press molding process is carried out so as to compress glass between an upper mold and a lower mold without regulating the edge surface of the outer periphery portion of the glass and, then, a crystallization process or an annealing process is carried out.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,474,807 Method for applying or removing coatings at a confined peripheral region of a substrate | 13 | 1993 | |
| 6,442,975 Method of manufacturing thin-plate glass article, method of manufacturing glass substrate for information recording medium, and method of manufacturing magnetic recording medium | 8 | 1999 | |
| 6,537,648 Substrate for an information recording medium, information recording medium using the substrate and method of producing the substrate | 15 | 2000 | |
| 6,627,566 Substrate for information recording medium and magnetic recording medium composed of crystallized glass | 9 | 2000 | |
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| 6,620,748 Light-amplifying glass, light-amplifying medium and resin-coated light-amplifying medium | 13 | 2001 | |
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| 6,096,445 Substrate for a magnetic recording medium, the magnetic recording medium, and a method of producing the same | 12 | 1998 | |
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| 6,539,750 Glass substrate forming mold and production method for glass substrate | 2 | 2000 | |
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| 5,774,265 Durable retroreflective elements | 28 | 1996 | |
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| 2002/0054,976 Molded glass substrate for magnetic disk and method for manufacturing the same | 21 | 2001 | |
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| 6,314,764 Method of manufacturing a 1-inch diameter glass substrate for a magnetic disk | 11 | 2001 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | May 8, 2015 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | May 8, 2019 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 8, 2023 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 3.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |