IP Library › Granted Patent US 4,457,911
Granted Patent Utility
US 4,457,911 · App. 06/404,964

Dialkyl malonates as organic sunscreen adjuvants

Inventors: Donald E. Conner, Boris M. Cumpelik
Patented Case View Patent ↗
Granted: Jul 3, 1984 Filed: Aug 3, 1982
Inventors
Donald E. Conner
Boris M. Cumpelik
Assignee (at issue)
Van Dyk & Company Inc.

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 4,457,911
App. No.
06/404,964
Filed
1982-08-03
Granted
1984-07-03
Kind
A