Number | Name | Date | Kind |
---|---|---|---|
1252363 | Roberts | Jan 1918 | |
1496309 | Girvin | Jun 1924 | |
2082622 | Fink | Jun 1937 | |
2374926 | Fink | May 1945 | |
2937108 | Toye | May 1960 | |
3526536 | Spengos et al. | Sep 1970 | |
3751288 | Alsey et al. | Aug 1973 | |
3809570 | Herman | May 1973 | |
3993235 | Boynton | Nov 1976 |
Number | Date | Country |
---|---|---|
848,925 | Aug 1970 | CA |
Entry |
---|
Burns & Bradley, Protective Coatings for Metals, Reinhold Publishing Corp., N.Y., 1955, pp. 29-31. |