The phrase "a proprietary procedure" is correct and usable in written English.
It can be used when referring to a specific method or process that is owned and controlled by a particular company or individual, often implying that it is not available for public use.
Example: "The company has developed a proprietary procedure for manufacturing its products, which gives it a competitive edge in the market."
Alternatives: "an exclusive method" or "a patented process".
RNA isolation after dissection was performed according to a proprietary procedure (Response Genetics Inc., US patent no. 6248535).
After hematoxylin-eosin staining, RNA was isolated in accordance with a proprietary procedure as we published before [ 21].
RNA extraction was performed according to a proprietary procedure (US patent number 6,248,535) (Lord et al, 2000; Kornmann et al, 2003).
RRM1 and RRM2 gene expression analysis was performed in RNA isolated from tumour tissue specimens after laser capture microdissection (Palm, Oberlensheim, Germany), according to a proprietary procedure (patent pending EP05077417.3) of Pangaea Biotech, SA.
All other sections were selectively dissected by laser captured microdissection (P.A.L.M. microsystem, Leica, Wetzlar, Germany) according to the standard procedure [ 22] RNA isolation from OCT-embedded specimens was done according to a proprietary procedure of Response Genetics, Inc. (US patent number 6,248,535) [ 23].
RNA was isolated from the macrodissected tumour tissue specimens in accordance with a proprietary procedure (European patent number EP1945764-B1).
RNA was isolated from these using a novel, proprietary procedure (Response Genetics, Los Angels, CA United Statess Patent Number 6,248,535).
A proprietary sizing procedure, COLETH, is used to initialize the optimization problem and to evaluate the objective function and the constraints during the optimization problem resolution.
This work reports on a proprietary synthesis procedure to Sn-doped titania photocatalysts developed by Štengl and co-workers [10 12] in aim to allow their possible future industrial production.
Cornell and VitaScan will together develop a medium-scale manufacturing and packaging process to optimize its proprietary procedure and create reliable tests for validation studies.
Our approach patently contrasts with those currently used to transiently deliver genetic materials, which are less effective and involve many expensive and proprietary procedures that limit their availability.
