US4606750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold for direct press molding of optical glass element
Assignee: Panasonic Holdings Corp
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Filing: 1984-12-07
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Granted: 1986-08-19
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Expires: 2004-12-07
Abstract
Abstract A mold used for manufacturing optical glass parts by the direct press molding of lumps of raw optical glass. The pressing surface of the mold is made of a material comprising alpha type SiC or amorphous SiC or a mixture of both. The pressing surface may be a coated film on a base body of hard alloy or high density carbon.
Inventors
- 👤 Hideo Torii
- 👤 Masaki Aoki
- 👤 Hideyuki Okinaka
- 👤 Satoru Yuhaku
- 👤 Shoji Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:13
CPC Classifications
C; C03; C03B; C03B40/00; C03B40/02; C03B11/00; C03B11/06; C03B11/08; C03B11/084; C03B11/086; C03B2215/00; C03B2215/02; C03B2215/08; C03B2215/10; C03B2215/12; C03B2215/14; C03B2215/22; C03B2215/30; C03B2215/34
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
45 words
A mold used for manufacturing optical glass parts by direct press molding of lumps of raw optical glass, characterized in that a pressing surface of said mold is made of a material comprising at least one of α type silicon carbide and amorphous silicon carbide.
Claim 2
Dependent Claim
45 words
A mold used for manufacturing optical glass parts by direct press molding of lumps of raw optical glass, characterized in that a pressing surface of said mold is made of a material comprising at least one of α type silicon carbide and amorphous silicon carbide.
Claim 3
Dependent Claim
27 words
A mold used for manufacturing optical glass parts by direct press molding of lumps of raw optical glass, comprising a sintered body of a type silicon carbide.
Claim 4
Dependent Claim
27 words
A mold used for manufacturing optical glass parts by direct press molding of lumps of raw optical glass, comprising a sintered body of a type silicon carbide.
Claim 5
Dependent Claim
72 words
A mold used for manufacturing optical glass parts by direct press molding of lumps of raw optical glass, comprising: a base body of hard alloy having a surface in the form of a surface of an optical glass to be molded; and a film coated on said surface of said base body with a uniform thickness, said coated film comprising at least one of α type silicon carbide and amorphous silicon carbide.
Claim 6
Dependent Claim
72 words
A mold used for manufacturing optical glass parts by direct press molding of lumps of raw optical glass, comprising: a base body of hard alloy having a surface in the form of a surface of an optical glass to be molded; and a film coated on said surface of said base body with a uniform thickness, said coated film comprising at least one of α type silicon carbide and amorphous silicon carbide.
Claim 7
Dependent Claim
26 words
The mold according to claim 3, wherein said hard alloy is mainly composed of 98-80 weight % of tungsten carbide and 2-20 weight % of cobalt.
Claim 8
Dependent Claim
17 words
The mold according to claim 4, wherein the grain size of said tungsten carbide is 0.05-0.5 μm.
Claim 9
Dependent Claim
87 words
A mold used for manufacturing optical glass parts by direct press molding of lumps of raw optical glass, comprising: a base body of carbon; a body of β type silicon carbide deposited on said base body and having a surface in the form of a surface of a glass part to be molded; and a film coated on said surface of said β type silicon carbide body with a uniform thickness, said coated film comprising at least one of α type silicon carbide and amorphous silicon carbide.
Claim 10
Dependent Claim
87 words
A mold used for manufacturing optical glass parts by direct press molding of lumps of raw optical glass, comprising: a base body of carbon; a body of β type silicon carbide deposited on said base body and having a surface in the form of a surface of a glass part to be molded; and a film coated on said surface of said β type silicon carbide body with a uniform thickness, said coated film comprising at least one of α type silicon carbide and amorphous silicon carbide.
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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) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |