US3897892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Custom formed wig block
Assignee: Individual
•
Filing: 1974-03-11
•
Granted: 1975-08-05
•
Expires: 1994-03-11
Abstract
Abstract An impression is first taken of the portion of a customer's head to be covered by a hairpiece and then is used as a mold die to form a wig stand conforming exactly to the customer's head shape. The material from which the stand is made is a lightweight, rigid, polymeric foam material such as a polyurethane foam comprising monthane and polyisonate having a density of 21/2 to 10 pcf and a hardness of 10 to 75 on the Shore A scale capable of being formed in an open mold.
Inventors
- 👤 James L Waters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:02
CPC Classifications
A; A41; A41G; A41G3/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
84 words
A custom molded wig block useful for the manufacture and storage of a hairpiece, said block being fOrmed of a lightweight, rigid, molded, polymeric foam material having a density range of 2 1/2 to 10 pounds per cubic feet and hardness of 10-75 on the Shore A scale, the surface of said block lying immediately beneath said hairpiece, when in place thereon, including a pattern of undulations and creases which conform exactly to the configuration of the corresponding area of a prescribed customer''s head.
Claim 2
Dependent Claim
84 words
A custom molded wig block useful for the manufacture and storage of a hairpiece, said block being fOrmed of a lightweight, rigid, molded, polymeric foam material having a density range of 2 1/2 to 10 pounds per cubic feet and hardness of 10-75 on the Shore A scale, the surface of said block lying immediately beneath said hairpiece, when in place thereon, including a pattern of undulations and creases which conform exactly to the configuration of the corresponding area of a prescribed customer''s head.
Claim 3
Dependent Claim
24 words
The wig block according to claim 1 wherein said foam material comprises a combination of 50% by weight monthane and 50% by weight polyisonate.
References Cited (Backward Citations)
US3254757A
Cited
US3189035A
Cited
US3289823A
Cited
US3468499A
Cited
US3441182A
Cited
US3610486A
Cited
US3693848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |