US3830670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graded multiphase carburized materials
Assignee: Surface Technology Corp
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Filing: 1972-04-10
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Granted: 1974-08-20
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Expires: 1992-04-10
Abstract
Abstract A carburized, multiphase material formed of at least one metal of each of Group I, II, and III. Group I is columbium, tantalum, and vanadium; Group II is titanium, zirconium and hafnium; and Group III is molybdenum, tungsten, rhenium and chromium. Have excellent abrasion resistance.
Inventors
- 👤 Thyne R Van
- 👤 J Rausch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:53
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/06; C23C8/34; C23C8/08; C23C8/20
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
23 words
The cutting tool as defined in claim 1 wherein the carbon pick-up is at least one milligram per square centimeter of surface area.
Claim 2
Dependent Claim
33 words
The cutting tool defined in claim 1 wherein Group II consists of titanium, zirconium, and mixtures thereof, and hafnium is present in amounts less than the combined total of said titanium and zirconium.
Claim 3
Dependent Claim
22 words
The cutting tool as defined in claim 1 wherein up to 25 percent of the carbon content thereof is replaced by boron.
Claim 4
Dependent Claim
25 words
The cutting tOol as defined in claim 1 wherein: a. Group II is titanium and zirconium; and b. Group III is molybdenum, tungsten and rhenium.
Claim 5
Dependent Claim
13 words
The cutting tool as defined in claim 5 wherein Group I is columbium.
Claim 6
Dependent Claim
50 words
The cutting tool as defined in claim 1 wherein: Group I content ranges from 40 to 90 percent; Group II ranges from 2 to 35 percent; Group III ranges from 2 to 40 percent; and, hafnium, if present of Group II, is present in amounts less than titanium and zirconium.
Claim 7
Dependent Claim
23 words
The cutting tool as defined in claim 7 wherein: Group II is titanium and zirconium; and Group III is molybdenum, tungsten and rhenium.
Claim 8
Dependent Claim
37 words
The cutting tool as defined in claim 1 wherein: Group I content ranges from 40 to 85 percent; Group II content ranges from 5 to 35 percent; and Group III content ranges from 5 to 55 percent.
Claim 9
Dependent Claim
23 words
The cutting tool as defined in claim 9 wherein hafnium, if present, is present in amounts less than titanium, zirconium, and mixtures thereof.
Claim 10
Dependent Claim
17 words
The cutting tool as defined in claim 9 wherein Group II is titanium, zirconium and mixtures thereof.
Claim 11
Dependent Claim
13 words
The cutting tool as defined in claim 9 wherein Group II is titanium.
Claim 12
Dependent Claim
51 words
The cutting tool as defined in claim 1 wherein: Group I content ranges from 40 to 85 percent; Group II content ranges from 7.5 to 35 percent; Group III content ranges from 5 to 30 percent; and The ratio of Group II content to Group III content is greater than one.
Claim 13
Dependent Claim
23 words
The cutting tool as defined in claim 13 wherein hafnium, if present, is present in amounts less than titanium, zirconium and mixtures thereof.
Claim 14
Dependent Claim
17 words
The cutting tool as defined in claim 13 wherein Group II is titanium, zirconium and mixtures thereof.
Claim 15
Dependent Claim
34 words
The cutting tool as defined in claim 15 wherein Group III is molybdenum, tungsten, rhenium and mixtures thereof and wherein the carbon pick-up is at least one milligram per square centimeter of surface area.
Claim 16
Dependent Claim
19 words
The cutting tool as defined in claim 16 wherein up to 25% of the carbon is replaced by boron.
Claim 17
Dependent Claim
23 words
The cutting tool as defined in claim 13 wherein Group II is titaniun and zirconium and Group III is molybdenum, tungsten, and rhenium.
Claim 18
Dependent Claim
26 words
The cutting tool as defined in claim 18 wherein Group I is columbium, vanadium and mixtures thereof and Group II is titanium, zirconium and mixtures thereof.
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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) | 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 |