US2904452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxide coating
Assignee: WC Heraus GmbH and Co KG
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Filing: 1956-04-16
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Granted: 1959-09-15
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Expires: 1976-04-16
Abstract
No abstract record available.
Inventors
- 👤 Reichelt Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:29
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/26; C23C14/0021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
THE METHOD OF COATING AN OBJECT WITH AN OXIDE A METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM, THORIUM, VANADIUM, TANTALUM, CHROMIUM, TUNGSTEN AND MOLYBDENUM COMPRISING THE STEPS OF DISPOSING THE OBJECT TO BE COATED IN A CHAMBER, SECURING THE METAL BETWEEN TWO SPACED ELECTRODES IN THE CHAMBER, EVACUATING THE CHAMBER, MAINTAINING A CONTINUOUS FLOW OF PURE OXYGEN THROUGH THE CHAMBER IN THE PRESSURE RANGE OF 10-4 TO 10-2 MM. OF HG, PASSING A CURRENT THROUGH THE ELECTRODES AND THE METAL TO HEAT THE METAL, AND SETTING THE CURRENT AT A LEVEL WHICH MAINTAINS THE TEMPERATURE OF THE METAL BELOW THE MELTING POINT, WHEREBY THE METAL IS MAINTAINED IN THE SOLID STATE AT AN ELEVATED TEMPERATURE DURING THE COATING PROCESS.
Claim 2
Independent Claim
121 words
THE METHOD OF COATING AN OBJECT WITH AN OXIDE A METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM, THORIUM, VANADIUM, TANTALUM, CHROMIUM, TUNGSTEN AND MOLYBDENUM COMPRISING THE STEPS OF DISPOSING THE OBJECT TO BE COATED IN A CHAMBER, SECURING THE METAL BETWEEN TWO SPACED ELECTRODES IN THE CHAMBER, EVACUATING THE CHAMBER, MAINTAINING A CONTINUOUS FLOW OF PURE OXYGEN THROUGH THE CHAMBER IN THE PRESSURE RANGE OF 10-4 TO 10-2 MM. OF HG, PASSING A CURRENT THROUGH THE ELECTRODES AND THE METAL TO HEAT THE METAL, AND SETTING THE CURRENT AT A LEVEL WHICH MAINTAINS THE TEMPERATURE OF THE METAL BELOW THE MELTING POINT, WHEREBY THE METAL IS MAINTAINED IN THE SOLID STATE AT AN ELEVATED TEMPERATURE DURING THE COATING PROCESS.
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) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |