Patent US2955957A successfully refreshed from Google Patents.
US2955957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating metals
Assignee: Interchrome SA
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Filing: 1957-09-10
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Granted: 1960-10-11
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Expires: 1977-09-10
Abstract
No abstract record available.
Inventors
- 👤 Dorner Henrik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:56
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/28; C23C10/34; C23C10/36; C23C10/38; C23C10/40; C23C10/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A PROCESS FOR COATING FERROUS METAL WITH CHROMIUM DY DIFFUSION, WHICH COMPRISES CARRYING OUT THE DIFFUSION IN A CLOSED CONTAINER HAVING AN INLET FOR INERT GAS WITHOUT ANY OUTLET THEREFOR BY HEATING SAID CONTAINER AND ITS CONTENTS IN A FURNACE AND WITHDRAWING THE CONTAINER FROM THE FURNACE WHEN HEATING IS COMPLETED, AND ADMITTING THE INERT GAS INTO THE CONTAINER AT LEAST AFTER COMPLETION OF THE HEATING AS SOON AS PRESSURE WITHIN THE CONTAINER BEGINS TO FALL BELOW ATMOSPHERIC PRESSURE.
Claim 2
Dependent Claim
79 words
A PROCESS FOR COATING FERROUS METAL WITH CHROMIUM DY DIFFUSION, WHICH COMPRISES CARRYING OUT THE DIFFUSION IN A CLOSED CONTAINER HAVING AN INLET FOR INERT GAS WITHOUT ANY OUTLET THEREFOR BY HEATING SAID CONTAINER AND ITS CONTENTS IN A FURNACE AND WITHDRAWING THE CONTAINER FROM THE FURNACE WHEN HEATING IS COMPLETED, AND ADMITTING THE INERT GAS INTO THE CONTAINER AT LEAST AFTER COMPLETION OF THE HEATING AS SOON AS PRESSURE WITHIN THE CONTAINER BEGINS TO FALL BELOW ATMOSPHERIC PRESSURE.
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) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |