Stairway apparatus and method of manufacture
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 16, 1990
Issued Date -
N/A
app pub date -
Dec 28, 1988
filing date -
Nov 13, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Stair apparatus and method of manufacture, wherein the stair apparatus has concrete tread pads and landings which are poured and set during manufacture so that pouring and setting of the concrete does not have to be done in the field, thereby saving much labor and time. The method includes a unique step of clamping the step elements between the stringer elements so that the step elements are firmly held in proper position during welding thereof to the stringer elements. The landings are supported in a novel manner in a stairwell, and the stair assemblies are supported between the landings.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully