Patent US3610229A successfully refreshed from Google Patents.
US3866618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nail file
Assignee: Individual
•
Filing: 1974-01-04
•
Granted: 1975-02-18
•
Expires: 1994-01-04
Abstract
Abstract The present invention relates to a nail file comprising a pair of file members backed with perforated plastic layers respectively and an adhesive mixed with a hardener, to connect the said pair of file members, wherein the said nail file has upper and lower filing surfaces on both sides thereof and the said adhesive becomes itself a core between the entire rear surfaces of said pair of file members. The nail file according to the present invention has the advantages that by proper selection of the kind and quantity of the hardener and by proper adjustment of the width of the core the product can have desired rigidity, flexibility and resiliency to match finger nails of a variety of configurations.
Inventors
- 👤 Sakichi Tsukamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:39
CPC Classifications
A; A45; A45D; A45D29/00; A45D29/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
65 words
A nail file comprising a pair of file members backed with resilient perforated plastic layers respectively and an adhesive mixed and kneaded with a hardener to connect the said pair so that the said nail file has upper and lower filing surfaces on both sides thereof and the said adhesive becomes itself a core between the entire rear surfaces of said pair of file members.
Claim 2
Dependent Claim
65 words
A nail file comprising a pair of file members backed with resilient perforated plastic layers respectively and an adhesive mixed and kneaded with a hardener to connect the said pair so that the said nail file has upper and lower filing surfaces on both sides thereof and the said adhesive becomes itself a core between the entire rear surfaces of said pair of file members.
Claim 3
Dependent Claim
24 words
A nail file as claimed in claim 1 wherein each of the pair of file members is made of a sheet of emery paper.
Claim 4
Dependent Claim
24 words
A nail file as claimed in claim 1 wherein each of the pair of file members is made of a sheet of emery cloth.
Claim 5
Dependent Claim
35 words
A nail file as claimed in claim 1 wherein the adhesive is well mixed and kneaded with a hardnener comprising any mixture of talc, lime powder, alumina, mica, diatomaceous earth, glass powder, flocks and asbestos.
References Cited (Backward Citations)
US2557175A
Cited
US2699791A
Cited
US3196885A
Cited
US3298381A
Cited
US3318318A
Cited
US3706316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |