US3661820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating composition for preventing carburization of steel parts with subsequent water wash-off capacity
Assignee: Park Chemical Co
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Filing: 1970-07-15
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Granted: 1972-05-09
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Expires: 1990-07-15
Abstract
Abstract A COMPOSITION FOR USE IN FORMING A COATING ON SELECTED SURFACES OF STEEL PARTS TO SELECTIVELY PREVENT CARBURIZATION THEREOF IN GAS CARBURIZING, PACK CURBURIZING, AND CARBONITRIDING MEDIUMS, SAID COMPOSITION BEING BASICALLY COMPRISED OF A WATER REDUCIBLE OR WATER SOLUBLE ORGANIC RESIN, A BORON MATERIAL SUCH A BORIC ACID, AND A CARRIER FLUID OF WATER.
Inventors
- 👤 Robert W Foreman
- 👤 Jon S Pontius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:40
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/04; C09; C09D; C09D167/00; C21; C21D; C21D1/00; C21D1/68; C21D1/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |