US4196181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microcrystalline monolithic carbon material
Assignee: Individual
•
Filing: 1978-06-26
•
Granted: 1980-04-01
•
Expires: 1998-06-26
Abstract
Abstract A material consisting of grains varying in size from 0.1 to a few microns intergrown so as to form regular aggregates. The geometric shape of the material is preset by a pattern made from a carbon-bearing non-diamond material and corresponds to the shape of the required finished article. The material can be made in any desired number of identical shapes.
Inventors
- 👤 Leonid F. Vereschagin
- 👤 Evgeny N. Yakovlev
- 👤 Vladislav N. Slesarev
- 👤 Vasily A. Stepanov
- 👤 Alexandr Y. Preobrazhensky
- 👤 Tatyana D. Varfolomeeva
- 👤 Ljudmila E. Shterenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:47
CPC Classifications
B; B01; B01J; B01J3/00; B01J3/06; B01J3/062; B01J3/065; B01J2203/00; B01J2203/06; B01J2203/0605; B01J2203/061; B01J2203/062; B01J2203/0625; B01J2203/065; B01J2203/0655; B01J2203/0675; B01J2203/068; B01J2203/0685
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
114 words
A microcrystalline monolithic material of carbon crystallized to a diamond structure, consisting of intergrown grains varying in size from 0.1 to a few microns, said grains being coalesced with each other to form regular aggregates, said material having a reproducible, predetermined geometric shape corresponding to that of its non-diamond carbon-bearing material precursor, a density higher than 3.55 g/cm 3 , an abrasion resistance higher than 100,000 an oxidation temperature in the air higher than 700° C., a hardness such that it scratches the octahedral surface of diamond, a lattice constant a o =3.566 A at a temperature of 25° C. and a pressure of 1 atm., and a preset surface finish within 10-60 microns.
Claim 2
Dependent Claim
114 words
A microcrystalline monolithic material of carbon crystallized to a diamond structure, consisting of intergrown grains varying in size from 0.1 to a few microns, said grains being coalesced with each other to form regular aggregates, said material having a reproducible, predetermined geometric shape corresponding to that of its non-diamond carbon-bearing material precursor, a density higher than 3.55 g/cm 3 , an abrasion resistance higher than 100,000 an oxidation temperature in the air higher than 700° C., a hardness such that it scratches the octahedral surface of diamond, a lattice constant a o =3.566 A at a temperature of 25° C. and a pressure of 1 atm., and a preset surface finish within 10-60 microns.
Claim 3
Dependent Claim
26 words
A microcrystalline monolithic material of carbon according to claim 1 having a reproducible, predetermined correct geometric shape corresponding to that of its non-diamond carbon-bearing material precursor.
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) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |