US 4889569
LITHIUM BEARING ALLOYS FREE OF LUDER LINES
Assignee
BOEING COMPANY, A CORP. OF DE
Filed
Mar 24, 1988
Granted
Dec 26, 1989
Location
RENTON WA US
Abstract
Aluminum-lithium alloy sheets are stretched under predetermined temperature and stretch rate conditions to provide contoured metal sheets. The temperature and stretch rate conditions provide a stretched sheet which is substantially free of Luder lines that are conventionally associated with stretch-formed aluminum-lithium alloy sheets.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Nov 14, 1988
Rescinded
Jun 9, 1989
Duration
6 months
Inventor
- 1WESLEY H. GRAHAM
Record Details
- Patent number
- US 4889569
- Application
- 07173091
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records
Browse by Assignee
BOEING COMPANY, A CORP. OF DEBack to patent indexSource: USPTO 35 USC §181 secrecy order records