US2772227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection of molybdenum and tungsten at high temperatures
Assignee: Westinghouse Electric Corp
•
Filing: 1953-06-29
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Granted: 1956-11-27
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Expires: 1973-06-29
Abstract
No abstract record available.
Inventors
- 👤 Martin F Quaely
- 👤 William C Lilliendahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:20
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C23; C23C; C23C10/00; C23C10/28; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/941; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12833; Y10T428/1284
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
93 words
THE METHOD OF PROTECTING AGAINST OXIDATION AT HIGH TEMPERATURE ARTICLES CONSTRUCTED OF METAL OF THE GROUP CONSISTING OF MOLYBDENUM, TUNGSTEN, AND ALLOYS THEREOF WITH EACH OTHER AND WITHSMALL PROPORTIONS OF METAL OF THE GROUP CONSISTING OF COBALT, NICKEL AND IRON, COMPRISING CLEANING SAID ARTICLES, ELECTROPLATING BY MAKING THEM CATHODES IN AN ELECTROLYTIC CELL IN WHICH THE ELECTROLYTE CONSISTS OF AN AQUEOUS SOLUTION OF CHROMIC ACID CONTAINING 150 TO 350 GRAMS OF CHROMIUM TRIOXIDE PER LITER AND VANADIUM SALT CONTAINING 2 TO 10 GRAMS OF VANADIUM PER LITER,SAID ELECTROLYTE ALSO CONTAINING ACETIC ACID TO
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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) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |