Norton-Alcoa
Patent Owner
Stats
- 1 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Sep 07, 1993 most recent publication
Details
- 1 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 294 Total Citation Count
- Jan 17, 1989 Earliest Filing
- 4 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
Intl Class
Technology
Matters
Rank in Class
Top Patents (by citation)
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Recent Publications
- No Recent Publications to Display
Recent Patents
Patent #
Title
Filing Date
Issue Date
Intl Class
RE34371 Lightweight proppant for oil and gas wells and methods for making and using sameJan 22, 92Sep 07, 93[C04B]
Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
4977116 Method for making lightweight proppant for oil and gas wellsExpiredFeb 21, 90Dec 11, 90[C04B]
4921820 Lightweight proppant for oil and gas wells and methods for making and using sameExpiredJan 17, 89May 01, 90[C04B]
4921821 Lightweight oil and gas well proppants and methods for making and using sameExpiredJan 17, 89May 01, 90[C04B]
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