Ludwig; Keith A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Ludwig; Keith A..The latest application filed is for "process and apparatus for producing nitrogen and oxygen".
- Ludwig; Keith A. - Emmaus PA
| Patent | Date |
|---|---|
| Process and apparatus for producing nitrogen and oxygen Grant 5,305,610 - Bennett , et al. April 26, 1 | 1994-04-26 |
| Separating argon/oxygen mixtures using a structured packing Grant RE34,038 - Bennett , et al. August 25, 1 | 1992-08-25 |
| Boiling process and a heat exchanger for use in the process Grant 5,122,174 - Sunder , et al. June 16, 1 | 1992-06-16 |
| Separating argon/oxygen mixtures using a structured packing Grant 4,836,836 - Bennett , et al. June 6, 1 | 1989-06-06 |
| Suitable distillation column packing for the cryogenic separation of air Grant 4,813,988 - Bennett , et al. March 21, 1 | 1989-03-21 |
| Multi-zone boiling process and apparatus Grant 4,700,771 - Bennett , et al. October 20, 1 | 1987-10-20 |
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