US PATENT SUBCLASS 530 / 354
.~.~ Gelatin

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


530 /   HD   CHEMISTRY: NATURAL RESINS OR DERIVATIVES; PEPTIDES OR PROTEINS; LIGNINS OR REACTION PRODUCTS THEREOF

350  DF  PROTEINS, I.E., MORE THAN 100 AMINO ACID RESIDUES {14}
353  DF  .~ Scleroproteins, e.g., fibroin, elastin, silk, etc. {3}
354.~.~ Gelatin {1}
355  DF  .~.~.~> Separation, purification or synthesis

DEFINITION

Classification: 530/354

Gelatin:

(under subclass 350) Proteins having the structure of gelatin and compounds derived from these by addition to or deletion of parts of the polypeptide structure.

(1) Note. Gelatin is not found in nature but is derived by hydrolysis of collagen.

(2) Note. Composition. Approximate amino acid content: glycine 25.5 percent, alanine 8.7 percent, valine 2.5 percent, leucine 3.2 percent, isoleucine 1.4 percent, cystine and cysteine 0.1 percent, methionine 1.0 percent, phenylalanine 2.2 percent, proline 18 percent, hydroxyproline 14 percent, serine 0.4 percent, threonine 1.9 percent, tyrosine 0.5 percent, aspartic acid 6.6 percent, glutamic acid 11.4 percent, arginine 8.1 percent, lysine 4.1 percent, histidine 0.8 percent. The total is over 100 percent because water is incorporated into the molecules of the individual amino acids.

(3) Note. Synonyms. Pharmagel A or B, Spongiofort, Gelatine Gelfoam, Puragen. Older Patents use the word glue to refer to impure gelatin; these patents have been placed here arbitrarily.

(4) Note. CA Registry Number of unmodified form: 900-70-8 [figure]

SEE OR SEARCH CLASS

430, Radiation Imagery Chemistry: Process, Composition, or Products Thereof, 537, 539, 628, 640, and 642 for compositions containing gelatin used in forming an image.

516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting,

77+, for colloid systems of colloid-sized solid phase dispersed in aqueous continuous liquid phase, subclasses 98+ for colloid systems of continuous or semicontinuous solid phase with discontinuous liquid phase (gels, pastes, flocs, coagulates); or agents for such systems or making or stabilizing such systems or agents; in each instance, when generically claimed or when there is hierarchically superior provision in the USPC for the specifically claimed art.

524, Synthetic Resins or Natural Rubbers,

21+, for animal derived proteins such as blood, particularly subclasses 22+ for Gelatin and 25+ for Casein, for a process in which the protein is physically mixed with a preformed resin.