Patent US2876148A successfully refreshed from Google Patents.
US2876148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold working metals coated with colloidal sulfur
Assignee: Individual
•
Filing: 1954-10-05
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Granted: 1959-03-03
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Expires: 1974-10-05
Abstract
No abstract record available.
Inventors
- 👤 Singer Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:03
CPC Classifications
B; B23; B23D; B23D31/00; B23D31/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
IN A METHOD OF COLD WORKING A METAL ARTICLE, THE STEP WHICH COMPRISES CONTACTING THE METALLIC SURFACE OF THE ARTICLE WITH COLLOIDAL SULFUR HAVING A PARTICLE SIZE BELOW ABOUT .1 MICRON AND A WATER CONTENT OF NOT LESS THAN ABOUT 3% BY WEIGHT WHEN IT IS BEING DEFORMED AND AT ITS ZONE OF DEFORMATION, THEREBY FORMING A PROTECTIVE COAT OF METAL SULFIDE ON THE ARTICLE.
Claim 2
Dependent Claim
65 words
IN A METHOD OF COLD WORKING A METAL ARTICLE, THE STEP WHICH COMPRISES CONTACTING THE METALLIC SURFACE OF THE ARTICLE WITH COLLOIDAL SULFUR HAVING A PARTICLE SIZE BELOW ABOUT .1 MICRON AND A WATER CONTENT OF NOT LESS THAN ABOUT 3% BY WEIGHT WHEN IT IS BEING DEFORMED AND AT ITS ZONE OF DEFORMATION, THEREBY FORMING A PROTECTIVE COAT OF METAL SULFIDE ON THE ARTICLE.
References Cited (Backward Citations)
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Cited
US1580417A
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US2349708A
Cited
US2591777A
Cited
US2644774A
Cited
US2588234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |