US4610933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duplication master suitable for the manufacture of electroplated copies
Assignee: US Philips Corp
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Filing: 1985-02-25
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Granted: 1986-09-09
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Expires: 2005-02-25
Abstract
Abstract A master suitable for the manufacture of electroplated negative metal copies. The master comprises a preform which on at least one side has a layer of electroplated aluminum. The surface has a precisely machined profile and is coated with a titanium nitride layer.
Inventors
- 👤 Renaat E. van de Leest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:14
CPC Classifications
B; B29; B29D; B29D17/00; B29D17/005; B29C; B29C33/00; B29C33/56; G; G11; G11B; G11B3/00; G11B3/68; G11B3/685; B29L; B29L2011/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12993
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
89 words
A duplication master for manufacturing negative copies by electroplating a metal onto a duplication surface of the master, said master consisting essentially of: a preform having a surface; a layer of electroplated aluminum on the preform surface, said aluminum layer having a shaped surface opposite the preform surface, said shaped surface having a desired profile; and an outer coating layer on the aluminum layer, said outer coating layer having an exposed surface which is the duplication surface of the master, said outer coating layer consisting essentially of titanium nitride.
Claim 2
Dependent Claim
89 words
A duplication master for manufacturing negative copies by electroplating a metal onto a duplication surface of the master, said master consisting essentially of: a preform having a surface; a layer of electroplated aluminum on the preform surface, said aluminum layer having a shaped surface opposite the preform surface, said shaped surface having a desired profile; and an outer coating layer on the aluminum layer, said outer coating layer having an exposed surface which is the duplication surface of the master, said outer coating layer consisting essentially of titanium nitride.
Claim 3
Dependent Claim
24 words
A duplication master as claimed in claim 1, wherein the shaped surface of the aluminum layer is given its desired profile by precision machining.
Claim 4
Dependent Claim
22 words
A duplication master as claimed in claim 2, wherein the thickness of the titanium nitride layer is between 10 and 300 nanometers.
Claim 5
Dependent Claim
26 words
A duplication master as claimed in claim 3, wherein an intermediate layer of titanium is provided between the electroplated aluminum layer and the titanium nitride layer.
References Cited (Backward Citations)
US4226082A
Cited
US4257854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-08 | 1990-03-10 | 1990-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-08 | 1994-03-10 | 1994-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-08 | 1998-03-10 | 1998-09-09 | $7700.00 | Window Closed / Lapsed |