US5246198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamond crystal coated mold for forming optical elements
Assignee: Canon Inc
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Filing: 1991-05-30
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Granted: 1993-09-21
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Expires: 2011-05-30
Abstract
Abstract Disclosed is a mold for forming glass material into optical elements, such as lenses and prisms, by press molding. In particular, the optical-element-molding surface of this mold is coated with diamond crystals in predetermined, spaced apart portions.
Inventors
- 👤 Noriko Kurihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:17
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/26; C23C16/27; C23C16/278; C03; C03B; C03B11/00; C03B11/06; C03B11/08; C03B11/084; C03B11/086; C23C16/274; C03B2215/00; C03B2215/02; C03B2215/08; C03B2215/10; C03B2215/12; C03B2215/14; C03B2215/24; C03B2215/30; C03B2215/34; C03B2215/38
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
63 words
A mold for forming optical elements of glass by press molding, comprising a mold base on which at least a molding surface thereof is coated with diamond crystals in such a manner that the diamond crystals are formed at predetermined portions selectively in a dispersed state, and areas adjacent to where each diamond crystal is formed are not in contact with each other.
Claim 2
Dependent Claim
63 words
A mold for forming optical elements of glass by press molding, comprising a mold base on which at least a molding surface thereof is coated with diamond crystals in such a manner that the diamond crystals are formed at predetermined portions selectively in a dispersed state, and areas adjacent to where each diamond crystal is formed are not in contact with each other.
Claim 3
Dependent Claim
18 words
A mold according to claim 1, wherein said diamond crystals of the dispersed state consist of diamond polycrystals.
Claim 4
Dependent Claim
18 words
A mold according to claim 1, wherein said diamond crystals of the dispersed state consist of diamond monocrystals.
Claim 5
Dependent Claim
18 words
A mold according to claim 1, wherein amorphous carbon exists in the diamond crystals of the dispersed state.
Claim 6
Dependent Claim
44 words
A mold for forming optical elements of glass by press molding, comprising a mold base on which at least a molding surface thereof is coated with a film consisting of diamond monocrystals existing in predetermined portions and amorphous carbon existing between the diamond monocrystals.
Claim 7
Dependent Claim
44 words
A mold for forming optical elements of glass by press molding, comprising a mold base on which at least a molding surface thereof is coated with a film consisting of diamond monocrystals existing in predetermined portions and amorphous carbon existing between the diamond monocrystals.
References Cited (Backward Citations)
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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) | 1996-09-20 | 1997-03-22 | 1997-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-20 | 2001-03-22 | 2001-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-20 | 2005-03-22 | 2005-09-21 | $7700.00 | Window Closed / Lapsed |