Method of manufacturing material for medical and pharmaceutical products from pyroligneous acid

Patent 5024731 Issued on June 18, 1991. Estimated Expiration Date:

November 29, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

736959

1697738

1884241

2859154

Antiinflammatory azole derivatives
Patent #: 4051250
Issued on: 09/27/1977
Inventor: Dahm, et al.

Separation of acids and esters in the processing of waste salt solution of cyclohexanone manufacture
Patent #: 4052441
Issued on: 10/04/1977
Inventor: Brunner

2-(1H-1,2,4-triazol-1-yl)-1,1-bis-(perfluoro-alkyl)ethanol antifungal agents Patent #: 4483862
Issued on: 11/20/1984
Inventor: Richardson , et al.

Inventors

Application

No. 442990 filed on 11/29/1989

US Classes:

203/99, MISCELLANEOUS SEPARATORY159/47.1, PROCESSES562/513, Preparation from source of undetermined composition (e.g., industrial waste, etc.)562/515, Preparation by degradation of carbohydrates562/608Purification or recovery per se

Examiners

Primary: Manoharan, Virginia

Attorney, Agent or Firm

Wenderoth, Lind & Ponack

Foreign Patent References

0466155 CA 06/12/2012
0476877 CA 09/12/2012
0241590 DE 12/12/1986

International Classes

B01D 003/00
C07C 051/42

Foreign Application Priority Data

1988-11-29 JP

Abstract

A method of manufacturing a material for medical and pharmaceutical products from pyroligneous acid extracted as water content in smoke generated by baking arbor and bark. Pyroligneous acid is heated, and resultant evaporation gas in a temperature range 98° to 103° C. is extracted and liquified by cooling.