Christmas tree
Patent 4331720 Issued on May 25, 1982. Estimated Expiration Date: 
May 30, 2000. 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.
May 30, 2000. 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 1600687 3176123 3677867 Ornamental artificial tree Collapsible artificial Christmas tree Patent #: 4130678 InventorsApplicationNo. 06/154903 filed on 05/30/1980US Classes:428/9, Collapsible428/20, Knockdown493/956Having appearance of living plant (e.g., Christmas tree, etc.)ExaminersPrimary: Epstein, Henry F.International ClassesA47G 33/06 (20060101)A47G 33/00 (20060101) AbstractA collapsible, artificial Christmas tree which folds away into a relatively thin box which serves as a stand for the tree when erected, the tree including a generally spiral coil of steel wire which is axially stretched between opposite ends of an assembled pole so to form a conical structure resembling a tree, the wire being coated with artificial pine covering and carrying Christmas tree electric lamps.Other References
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