US3446607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iridium coated graphite
Assignee: Union Carbide Corp
•
Filing: 1965-09-14
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Granted: 1969-05-27
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Expires: 1985-09-14
Abstract
No abstract record available.
Inventors
- 👤 Herbert F Volk
- 👤 Robert A Mercuri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:51
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/51; C04B41/5105; C04B41/80; C04B41/81; C04B41/85; C04B41/88; C23; C23C; C23C16/00; C23C16/06; C23C16/16; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/935; Y10S428/938; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12049; Y10T428/12056; Y10T428/12063; Y10T428/12069; Y10T428/12076; Y10T428/12493; Y10T428/12535; Y10T428/12625; Y10T428/12639; Y10T428/12646; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A GRAPHITE SUBSTRATE RESISTANT TO OXIDATION AT TEMPERATURES UP TO 2000*C., SAID SUBSTRATE HAVING AN ESSENTIALLY PORE-FREE COATING OF IRIDIUM, SAID COATING COMPRISING AN INNER LAYER ADJACENT SAID GRAPHITE SUBSTRATE FORMED OF SINTERED FINELY DIVIDED PARTICLES OF IRIDIUM, AN INTERMEDIATE LAYER OF VAPOR PLATED IRIDIUM, AND AN OUTER LAYER OF ELECTRO-PLATED IRIDIUM.
Claim 2
Dependent Claim
52 words
A GRAPHITE SUBSTRATE RESISTANT TO OXIDATION AT TEMPERATURES UP TO 2000*C., SAID SUBSTRATE HAVING AN ESSENTIALLY PORE-FREE COATING OF IRIDIUM, SAID COATING COMPRISING AN INNER LAYER ADJACENT SAID GRAPHITE SUBSTRATE FORMED OF SINTERED FINELY DIVIDED PARTICLES OF IRIDIUM, AN INTERMEDIATE LAYER OF VAPOR PLATED IRIDIUM, AND AN OUTER LAYER OF ELECTRO-PLATED IRIDIUM.
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) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |