Bizarre Patents
A vest or belt is integrally formed with tubular, pet receiving passageways which extend around the wearer's body and terminate in pocket-like chambers for feeding and retrieval.
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US Patent 4960429 - Chromium free process for the tanning of hides
US Patent Issued on October 2, 1990
Estimated Patent Expiration Date:
March 9, 2009Estimated 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.
Estimated Patent Expiration Date:
March 9, 2009Estimated 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.AbstractA process for the tanning of skins applicable to lamb, goat, calf hides, or skins from other origins. The process is based in the previous modification of the collagen of the skin by covalent reaction with polyfunctional polymers with a high quantity of hydroxylic groups. The modification treatment may be carried out after bated skin or pickled skin has been previously depickled. After binding of the polymer, the reactivity of the skin substrate is modified whereby it will show a higher affinity for titanium salts, for example ammonium titanyl double sulphate, titanyl sulphate or any other soluble titanium compound. | InventorsAssigneeApplicationNo. 321006 filed on 03/09/1989US Classes:8/94.26, With organic material8/94.1RTREATMENT OF HIDES, SKINS, FEATHERS AND ANIMAL TISSUESExaminersPrimary: Lieberman, PaulAssistant: McNally, John F. Attorney, Agent or FirmUS Patent References3934975, Leather treating processIssued on: 01/27/1976 Inventor: Kelly , et al.4731089Leather tanning process using aluminium (III) and titanium (IV) complexes Issued on: 03/15/1988 Inventor: Covington International ClassesC14C 003/02C14C 003/04 Foreign Application Priority Data1988-11-17 ES |
