Relating to writing instruments
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 7, 1998
Grant Date -
N/A
app pub date -
Oct 29, 1996
filing date -
Dec 17, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A container for ink for a writing instrument including a reservoir for containing ink, an ink feed for connection to a writing tip of a writing instrument for conveying ink from the reservoir to the writing tip, and a valve between the reservoir and the ink feed. The valve is subjected on one side to pressure in the ink feed and is subjected on another side to atmospheric pressure. The valve opens when pressure in the ink feed falls sufficiently below the atmospheric pressure acting on the valve, thereby allowing ink to flow from the reservoir to the ink feed.
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