US3028261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromizing metals
Assignee: Chromalloy Corp
•
Filing: 1958-04-24
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Granted: 1962-04-03
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Expires: 1978-04-24
Abstract
No abstract record available.
Inventors
- 👤 Richard L Wachtell
- 👤 Richard P Seelig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:26
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/28; C23C10/34; C23C10/36; C23C10/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN A METHOD FOR THE DIFFUSION COATING OF CHROMIUM ON THE SURFACE OF A REFRACTORY BASE METALLIC BODY SUBSTANTIALLY IN THE ABSENCE OF NITROGEN-, HYDROGEN-, AND OXYGEN-CONTAINING COMPOUNDS, THE STEPS WHICH COMPRISE IMMERSING SAID METALLIC BODY IN A CHROMIZING PACK CONTAINING A SOURCE OF CHROMIUM AND A VOLATILE SOURCE OF HALOGEN BUT BEING SUBSTANTIALLY FREE OF NITROGEN- AND HYDROGEN-CONTAINING MATERIALS, SUBJECTING SAID CHROMIZING PACK TO AN ATMOSPHERE OF AN INERT GAS WHICH IS SUB-
Claim 2
Dependent Claim
74 words
IN A METHOD FOR THE DIFFUSION COATING OF CHROMIUM ON THE SURFACE OF A REFRACTORY BASE METALLIC BODY SUBSTANTIALLY IN THE ABSENCE OF NITROGEN-, HYDROGEN-, AND OXYGEN-CONTAINING COMPOUNDS, THE STEPS WHICH COMPRISE IMMERSING SAID METALLIC BODY IN A CHROMIZING PACK CONTAINING A SOURCE OF CHROMIUM AND A VOLATILE SOURCE OF HALOGEN BUT BEING SUBSTANTIALLY FREE OF NITROGEN- AND HYDROGEN-CONTAINING MATERIALS, SUBJECTING SAID CHROMIZING PACK TO AN ATMOSPHERE OF AN INERT GAS WHICH IS SUB-
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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) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |