US3829969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting tool with alloy coated sharpened edge
Assignee: Gillette Co LLC
•
Filing: 1970-11-05
•
Granted: 1974-08-20
•
Expires: 1990-11-05
Abstract
Abstract A protective layer of an alloy of platinum and chromium is formed on a substrate by sputtering, this metal alloy providing a hard, corrosion resistant, protective layer for the substrate.
Inventors
- 👤 I Fischbein
- 👤 B Alexander
- 👤 A Sastri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:50
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/54; B26B21/58; C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/16; C23C14/165; C23C14/22; C23C14/34; C23C14/35; C23C30/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9265; Y10S428/932; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12778; Y10T428/12861; Y10T428/12875
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
31 words
An article according to claim 1 in which said first metal is selected from the class consisting of iridium, osmium, platinum, rhenium, rhodium, and ruthenium and said second metal is chromium.
Claim 2
Dependent Claim
23 words
An article according to claim 1 wherein said second metal is selected from the class consisting of chromium, molybdenum, niobium, titanium, and vanadium.
Claim 3
Dependent Claim
22 words
An article according to claim 1 in which said first metal is selected from the class consisting of platinum, iridium, and osmium.
Claim 4
Dependent Claim
19 words
An article according to claim 1 in which the alloy film is at least as hard as said substrate.
Claim 5
Dependent Claim
23 words
An article according to claim 1 wherein the alloy film on said substrate has a maximum crystallite size of less than 1, 000A.
Claim 6
Dependent Claim
13 words
The article as claimed in claim 6 wherein said second metal is chromium.
Claim 7
Dependent Claim
17 words
An article according to claim 1 in which the alloy film is composed of platinum and chromium.
Claim 8
Dependent Claim
23 words
An article according to claim 8 in which the alloy film is composed of 21-27 atomic per cent platinum and the remainder chromium.
Claim 9
Dependent Claim
17 words
An article according to claim 1 in which the alloy film is composed of platinum and titanium.
Claim 10
Dependent Claim
18 words
The article as claimed in claim 1 wherein said alloy film has a thickness of at least 50A.
Claim 11
Dependent Claim
20 words
The article as claimed in claim 1 wherein the thickness of said alloy film is in the range of 100-400A.
Claim 12
Dependent Claim
12 words
The article as claimed in claim 1 wherein said substrate is steel.
Claim 13
Dependent Claim
121 words
A razor blade comprising a substrate having a sharpened edge and an alloy film of composition different from said substrate on said sharpened edge, said alloy film having a microhardness of at least about 750 DPHN and being at least as hard as the underlying substrate material and being an intermetallic compound with either the ordered A15 cubic structure or the tetragonal ordered structure or a composition with proportions within about + or -5 weight percent of such a compound, the intermetallic compound consisting of a first metal selected from the class consisting of iridium, osmium, palladium, platinum, rhenium, rhodium, and ruthenium and a second metal selected from the class consisting of chromium, manganese, molybdenum, niobium, tantalum, titanium, tungsten and vanadium.
Claim 14
Dependent Claim
24 words
The blade as claimed in claim 14 wherein said second metal is selected from the class consisting of chromium, molybdenum, niobium, titanium, and vanadium.
Claim 15
Dependent Claim
38 words
The blade as claimed in claim 14 wherein said first metal is selected from the class consisting of iridium, osmium, platinum, rhodium and ruthenium, and said second metal is selected from the class consisting of chromium and titanium.
Claim 16
Dependent Claim
28 words
The blade as claimed in claim 14 wherein said first metal is selected from the class consisting of iridium, osmium and platinum and said second metal is chromium.
Claim 17
Dependent Claim
23 words
The blade as claimed in claim 14 wherein said alloy film is composed of 20-30 atomic per cent platinum and the remainder chromium.
Claim 18
Dependent Claim
23 words
The blade as claimed in claim 14 wherein said alloy film is composed of 21-27 atomic per cent platinum and the remainder chromium.
Claim 19
Dependent Claim
18 words
The blade as claimed in claim 14 wherein said alloy film has a thickness of less than 600A.
Claim 20
Dependent Claim
20 words
The blade as claimed in claim 14 wherein the thickness of said alloy film is in the range of 100-400A.
Claim 21
Dependent Claim
38 words
The blade as claimed in claim 21 wherein the corrosion resistance of said alloy film is such that the cutting edge of said blade shows no sign of corrosion after immersion in concentrated hydrochloric acid for one minute.
Claim 22
Dependent Claim
13 words
The blade as claimed in claim 22 wherein said second metal is chromium.
Claim 23
Dependent Claim
23 words
The blade as claimed in claim 23 wherein said alloy film is composed of 20-30 atomic per cent platinum and the remainder chromium.
Claim 24
Dependent Claim
23 words
The blade as claimed in claim 24 wherein said alloy film is composed of 21-27 atomic per cent platinum and the remainder chromium.
Claim 25
Dependent Claim
30 words
The blade as claimed in claim 14 and further including a thin chromium containing overlayer on said alloy film, said overlayer being of a different composition from said alloy film.
Claim 26
Dependent Claim
28 words
The blade as claimed in claim 22 wherein said first metal is selected from the class consisting of iridium, osmium and platinum and said second metal is chromium.
Claim 27
Dependent Claim
23 words
The blade as claimed in claim 27 wherein said alloy film is composed of 21-27 atomic per cent platinum and the remainder chromium.
References Cited (Backward Citations)
CA457378A
Cited
US2470033A
Cited
US3480483A
Cited
US3479161A
Cited
GB1184428A
Cited
US3494748A
Cited
US3399981A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |