Claims
- 1. A stainless steel surface having a passivation film on at least a portion thereof, said film having a thickness of more than 50 .ANG., said film containing mainly chrome oxide.
- 2. The stainless steel surface according to claim 1, wherein the stainless steel surface on which said passivation film is located has a flatness with the maximum height difference Cf the convex and the concave portions thereof being less than 1 .mu.m within any circle 5 .mu.m in radius.
Parent Case Info
This is a division of application Ser. No. 08/458,755, filed Jun. 2, 1995, now U.S. Pat. No. 5,789,086 which is a division of application Ser. No. 08/213,079, filed Mar. 15, 1994, now U.S. Pat. No. 5,906,688 which is a continuation of U.S. patent application Ser. No. 08/097,861, abandoned filed Jul. 26, 1993, which is a continuation of U.S. patent application Ser. No. 07/990,549, filed Dec. 14, 1992, abandoned which is a continuation of U.S. patent application Ser. No. 07/536,547, filed Jul. 10, 1990, abandoned which is a continuation of International application PCT/JP89/00023, filed Jan. 11, 1989, which designated the United States; the present application is also a continuation of U.S. patent application Ser. No. 07/721,450, filed Aug. 8, 1991, abandoned which is a continuation of International application PCT/JP89/01308, filed Dec. 26, 1989, which designated the United States; and the present application is also a continuation of U.S. patent application Ser. No. 08/121,174, filed Sep. 13, 1993, now U.S. Pat. No. 5,313,982, which is a continuation of U.S. patent application Ser. No. 07/922,370, filed Jul. 29, 1992, abandoned which is a continuation of U.S. patent application Ser. No. 07/465,226, filed Mar. 5, 199, abandoned which is a continuation of International patent application PCT/JP89/00690, filed Jul. 2, 1989, which designated the United States.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5789086 |
Ohmi |
Aug 1998 |
|
Divisions (2)
|
Number |
Date |
Country |
Parent |
458755 |
Jun 1995 |
|
Parent |
213079 |
Mar 1994 |
|
Continuations (8)
|
Number |
Date |
Country |
Parent |
097861 |
Jul 1993 |
|
Parent |
990549 |
Dec 1992 |
|
Parent |
536547 |
Jul 1990 |
|
Parent |
PCTJP8900023 |
Jan 1989 |
|
Parent |
PCTJP8901308 |
Dec 1989 |
|
Parent |
922370 |
Jul 1992 |
|
Parent |
465226 |
Mar 1990 |
|
Parent |
PCTJP8900690 |
Jul 1989 |
|