This bulletin is a collection of abstracts of U.S. patents selected from those published in the first 11 volumes of Fertilizer Abstracts. It contains 1014 abstracts selected as the most pertinent U.S. patents for the fertilizer industry today. U.S. equivalents of previously issued foreign patents are included. Defensive publications issued by the U.S. patent office have not been included.

February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index

Van de volgende stoffen of processen wordt gesteld dat ze de meststoffenmarkt spoedig zullen beinvloeden: suspensies van ureum-ammoniumnitraat, ureum-ammoniumsulfaat, ammoniumfosfaat en ammoniumpolyfosfaat, gegroepeerde produktie van orthofosfaatsuspensie uit fosforzuur, gegroepeerde produktie van orthofosfaatsuspensies uit diammonium, ammonium-polyfosfaat-sulfaatsuspensie, ureum-salpeterfosfaten. Ingegaan wordt op de produktiewijze