Patent US3436253A successfully refreshed from Google Patents.
US3436253A
Expired / Lapsed
US
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Alloys for improving properties of graphite
Assignee: United States Department of the Navy
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Filing: 1966-04-13
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Granted: 1969-04-01
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Expires: 1986-04-13
Abstract
No abstract record available.
Inventors
- 👤 Royal W Kelsey
- 👤 Donald D Crooks
- 👤 Henry T Sumsion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:06
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B35/00; C04B35/515; C04B35/52; C04B41/45; C04B41/52; C04B41/80; C04B41/81; C04B41/89; C22; C22C; C22C14/00; C22C16/00; Y; Y10; Y10S; Y10S60/00; Y10S60/909; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A COMPOSITE ARTICLE FOR USE UNDER CONDITIONS OF ELEVATED TEMPERATURES COMPRISING A SUBSTRATE OF GRAPHITE COATED AND IMPREGNATED WITH A LAYER OF ALLOY MATERIAL HAVING A COMPOSITION OF FROM ABOUT ONE TO TWENTY WEIGHT PERCENT BERYLLIUM, BALANCE BEING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM AND TITANIUM SAID ARTICLE BEING CHARACTERIZED BY AN INCREASE IN STRENGTH AND RESISTANCE TO AIR CORROSION AND EROSION.
Claim 2
Dependent Claim
65 words
A COMPOSITE ARTICLE FOR USE UNDER CONDITIONS OF ELEVATED TEMPERATURES COMPRISING A SUBSTRATE OF GRAPHITE COATED AND IMPREGNATED WITH A LAYER OF ALLOY MATERIAL HAVING A COMPOSITION OF FROM ABOUT ONE TO TWENTY WEIGHT PERCENT BERYLLIUM, BALANCE BEING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM AND TITANIUM SAID ARTICLE BEING CHARACTERIZED BY AN INCREASE IN STRENGTH AND RESISTANCE TO AIR CORROSION AND EROSION.
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) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |