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Publication numberUS1411518 A
Publication typeGrant
Publication dateApr 4, 1922
Filing dateApr 22, 1921
Publication numberUS 1411518 A, US 1411518A, US-A-1411518, US1411518 A, US1411518A
InventorsW. Robertson
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
robertson
US 1411518 A
Images(4)
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Description  (OCR text may contain errors)

A. w. MBERTSON..v

PAPER LIFT.

APPLICATION FILED APR-22, 1921.

A. W. ROBERTSON.

PAPER LIFT.

APPLICATION FILED APR.22. 192|.

Patented Apr. 4, 1922.

3 SHEETS-SHEET 2.

/4 I II-

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4001031 *Apr 7, 1975Jan 4, 1977Chem-Trol Pollution Services, Inc.Process for making low alkali cement clinker
US4162922 *May 26, 1976Jul 31, 1979Klockner-Humboldt-Deutz AktiengesellschaftMethod and apparatus for the lowering of the alkali content of cement calcined to completion
Classifications
U.S. Classification106/758, 71/61, 106/768, 423/200
International ClassificationC22B26/10, C22B26/00
Cooperative ClassificationC22B26/10
European ClassificationC22B26/10