Patent US2729992A successfully refreshed from Google Patents.
US2729992A
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Rolling of metals
Assignee: Universal Oil Products Co
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Filing: 1952-07-19
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Granted: 1956-01-10
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Expires: 1972-07-19
Abstract
No abstract record available.
Inventors
- 👤 Wankat Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:24
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2207/00; C10M2207/40; C10M2207/404; C10M2215/00; C10M2215/14; C10M2219/00; C10M2219/08; C10M2219/082; C10N; C10N2040/00; C10N2040/20; C10N2040/22; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
IN A PROCESS OF ROLLING METAL IN CONTACT WITH A LUBRICATING OIL, WHEREIN THE METAL NORMALLY BECOMES DISCOLORED DURING THE ROLLING THEREOF, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE LUBRICATING OIL, IN A SMALL BUT SUFFICIENT AMOUNT TO REDUCE DISCOLORATION OF THE METAL, A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A DISALICYLAL DIAMINO ALKANE AND AN ORTHO-HYDROXYBENZAL AMINOPHENOL.
Claim 2
Dependent Claim
59 words
IN A PROCESS OF ROLLING METAL IN CONTACT WITH A LUBRICATING OIL, WHEREIN THE METAL NORMALLY BECOMES DISCOLORED DURING THE ROLLING THEREOF, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE LUBRICATING OIL, IN A SMALL BUT SUFFICIENT AMOUNT TO REDUCE DISCOLORATION OF THE METAL, A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A DISALICYLAL DIAMINO ALKANE AND AN ORTHO-HYDROXYBENZAL AMINOPHENOL.
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) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |