IP Library Granted Patent US 4,458,831
Granted Patent Utility
US 4,458,831 · App. 06/399,541

Variable flow dispensing device

Inventors: Peter M. Holleran, Bruce H. Wisner
Patented Case View Patent ↗
Granted: Jul 10, 1984 Filed: Jul 19, 1982
Inventors
Peter M. Holleran
Bruce H. Wisner
Assignee (at issue)
W. R. Grace & Co.

This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,458,831
App. No.
06/399,541
Filed
1982-07-19
Granted
1984-07-10
Kind
A