Jewellery clasp
Patent 3947932 Issued on April 6, 1976. Estimated Expiration Date: 
April 6, 1993. Estimated 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.
April 6, 1993. Estimated 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.Patent References 1499428 1702360 2178572 3308517 3739433 InventorAssigneeApplicationNo. 458421 filed on 04/05/1974US Classes:24/616, Having connected leading edge and separated trailing arms24/618Forming total external surface of projectionExaminersPrimary: Gelak, Bernard A.Attorney, Agent or FirmAbstractThe present invention provides a jewellery clasp in which a latch is formed of a single piece of material folded back upon itself to form a U-shaped spring with an upstanding projection thereon, and a holder is formed of a single piece of material with base, sides and upper catch plate, the latter having an aperture into which the upstanding projection is engaged by the spring to fasten the clasp. | |
