US3753669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coinage materials
Assignee: Texas Instruments Inc
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Filing: 1971-12-22
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Granted: 1973-08-21
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Expires: 1991-12-22
Abstract
Abstract Novel and advantageous metal laminates of low cost, nonmagnetic materials, and coins made from the laminates, comprise outer cladding layers of coin silver or cupronickel metallurgically bonded to opposite sides of a core layer of nickel silver to provide substantially uniform color along the edges of the laminates and coins and to provide the coins with properties useful in coinage discrimination.
Inventors
- 👤 R Churchill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:08
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/925; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12882; Y10T428/12896
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
55 words
A composite material as set forth in claim 1 wherein said core layer has a thickness comprising from about 80 to 98 percent of the total thickness of said composite material and each of said cladding layers has a thickness comprising from about 1 to 10 percent of the total thickness of said composite material.
Claim 2
Dependent Claim
45 words
A composite material as set forth in claim 2 wherein one layer is formed of a nickel silver alloy having a nominal composition, by weight, of from 55 to 66 percent copper, from 18 to 27 percent zinc, and from 10 to 18 percent nickel.
Claim 3
Dependent Claim
78 words
A composite material as set forth in claim 3 wherein said cladding layers embody a white metal selected from the group consisting of a cuprocnickel alloY having a nominal composition, by weight, of 75 percent copper and 25 percent nickel, a cupronickel alloy having a nominal composition, by weight, of 70 percent copper and 30 percent nickel, and a coin silver alloy having a nominal composition, by weight, of at least 80 percent silver and the balance copper.
Claim 4
Dependent Claim
87 words
A composite metal laminate material useful in making coins comprising a core layer of nickel silver alloy having a nominal composition, by weight, of 66 percent copper, 24 percent zinc, and 10 percent nickel, and a cladding layer of cupronickel alloy metallurgically bonded to opposite sides of said core layer, said cupronickel alloy having a nominal composition, by weight, of 75 percent copper and 25 percent nickel, each of said cladding layers having a thickness comprising about 5 percent of the total thickness of the composite material.
Claim 5
Dependent Claim
12 words
A coin made from the composite material set forth in claim 1.
Claim 6
Dependent Claim
12 words
A coin made from the composite material set forth in claim 2.
Claim 7
Dependent Claim
12 words
A coin made from the composite material set forth in claim 3.
Claim 8
Dependent Claim
12 words
A coin made from the composite material set forth in claim 4.
Claim 9
Dependent Claim
12 words
A coin made from the composite material set forth in claim 5.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |