Patent US3021231A successfully refreshed from Google Patents.
US3021231A
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Chromizing
Assignee: Alloy Surfaces Co Inc
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Filing: 1959-08-13
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Granted: 1962-02-13
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Expires: 1979-08-13
Abstract
No abstract record available.
Inventors
- 👤 George A Samuel
- 👤 Jerome V Bell
- 👤 Alvah W Grosvenor
- 👤 Jackson Joseph Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:34
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
75 words
THE PROCESS OF CHROMIZING IRON OR STEEL WORK, WHICH COMPRISES PLACING WITHIN A CLOSED RETORT THE WORK, A POROUS METAL SOURCEOF CHROMINUM CONTAINING AT LEAST 30 PERCENT BY WEIGHT OF CHROMINUM, HAVING A PARTICLE SIZE BETWEEN 0.02 AND 3.00 INCHES AND HAVING AN INTERCONNECTED POROSITY OF 5 TO 60 PERCENT BY VOLUME, SAID POROUS SOURCE OF CHROMINUM HAVING A CONTENT WITHIN ITS PORES OF AT LEAST ONE CHROMOUS HALIDE EQUIVALENT TO THE FOLLOWING INDIVIDUAL CONCENTRATION.
Claim 2
Dependent Claim
75 words
THE PROCESS OF CHROMIZING IRON OR STEEL WORK, WHICH COMPRISES PLACING WITHIN A CLOSED RETORT THE WORK, A POROUS METAL SOURCEOF CHROMINUM CONTAINING AT LEAST 30 PERCENT BY WEIGHT OF CHROMINUM, HAVING A PARTICLE SIZE BETWEEN 0.02 AND 3.00 INCHES AND HAVING AN INTERCONNECTED POROSITY OF 5 TO 60 PERCENT BY VOLUME, SAID POROUS SOURCE OF CHROMINUM HAVING A CONTENT WITHIN ITS PORES OF AT LEAST ONE CHROMOUS HALIDE EQUIVALENT TO THE FOLLOWING INDIVIDUAL CONCENTRATION.
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) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |