Polyanionic surfactants and methods of making and using thereof
US-12577451-B2 · Mar 17, 2026 · US
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Dwarakanath Varadarajan patents
Dwarakanath Varadarajan is listed as an inventor on 120 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Dwarakanath Varadarajan |
| Total patents | 120 |
| First publication | Feb 24, 2015 |
| Latest publication | Mar 17, 2026 |
Notable patents
Publications ranked by popularity score, then publication date.
Polyanionic surfactants and methods of making and using thereof
US-2026055314-A1 · Feb 26, 2026 · US
Compositions and methods for breaking foams and emulsions
US-12528982-B2 · Jan 20, 2026 · US
Compositions and methods for treating unconventional subterranean formations
US-2025382860-A1 · Dec 18, 2025 · US
Polyanionic surfactants and methods of making and using thereof
US-12480036-B2 · Nov 25, 2025 · US
Polyanionic surfactants and methods of making and using thereof
US-2025354063-A1 · Nov 20, 2025 · US
Compositions containing friction reducers and methods of using thereof in oil and gas operations
US-2025334038-A1 · Oct 30, 2025 · US
Injection fluids comprising an anionic surfactant for treating unconventional formations
US-12435262-B2 · Oct 7, 2025 · US
Methods for improving hydrocarbon lift and liquid unloading from a subterranean formation
US-2025290397-A1 · Sep 18, 2025 · US
Methods for improving hydrocarbon production from a subterranean formation
US-2025289994-A1 · Sep 18, 2025 · US
Recent patents
Latest publications not already listed above.
Olefin sulfonates
US-12391867-B2 · Aug 19, 2025 · US
Compositions and methods for breaking foams and emulsions
US-2025250478-A1 · Aug 7, 2025 · US
Methods for hydrocarbon recovery
US-12378464-B2 · Aug 5, 2025 · US
Methods for hydrocarbon recovery
US-12371606-B2 · Jul 29, 2025 · US
Polyanionic surfactants and methods of making and using thereof
US-12371619-B2 · Jul 29, 2025 · US
Compositions containing friction reducers and methods of using thereof in oil and gas operations
US-12352149-B2 · Jul 8, 2025 · US
Use of a borate-acid buffer in oil and gas operations
US-12331245-B2 · Jun 17, 2025 · US
Polyanionic surfactants and methods of making and using thereof
US-12286588-B2 · Apr 29, 2025 · US
Methods for hydrocarbon recovery
US-12275893-B2 · Apr 15, 2025 · US
Methods for hydrocarbon recovery
US-12247162-B2 · Mar 11, 2025 · US
Compositions and methods for foam stimulation
US-2024384158-A1 · Nov 21, 2024 · US
Injection fluids for stimulating fractured formations
US-2024327698-A1 · Oct 3, 2024 · US
Injection fluids comprising a non-ionic surfactant for treating unconventional formations
US-2024279532-A1 · Aug 22, 2024 · US
Methods for hydrocarbon recovery
US-2024271031-A1 · Aug 15, 2024 · US
Injection fluids comprising an anionic surfactant for treating unconventional formations
US-2024271032-A1 · Aug 15, 2024 · US
Methods for hydrocarbon recovery
US-2024254382-A1 · Aug 1, 2024 · US
Methods for hydrocarbon recovery
US-2024247180-A1 · Jul 25, 2024 · US
Methods of using olefin sulfonates
US-12012549-B2 · Jun 18, 2024 · US
Olefin sulfonate compositions
US-12012547-B2 · Jun 18, 2024 · US
Methods for hydrocarbon recovery
US-2024182779-A1 · Jun 6, 2024 · US
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Chevron Usa Inc | 121 |
| Chevron Oronite Co | 16 |
| Kemira Oyj | 2 |
| Winslow Gregory | 1 |
| Prukop Gabriel | 1 |
Top CPC classifications
Most common classification codes across this inventor's patents.