US4250216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visible indexes
Assignee: Individual
•
Filing: 1979-04-16
•
Granted: 1981-02-10
•
Expires: 1999-04-16
Abstract
Abstract Visible index strips which may or may not be preprinted and which can, at least in most cases, be produced at a lower cost than previously patented index strips. The index strips are of multi-ply construction with the plies typically, but not necessarily, being made of paper.
Inventors
- 👤 Alexander P. Janssen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:11
CPC Classifications
B; B42; B42F; B42F21/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1059; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24438; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982; Y10T428/31986
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
79 words
A flexible visible index strip of multiple ply construction which has smooth edges and comprises a first, strong, flexible ply composed of a fibrous, cellulosic mat impregnated with from 25 to 75 percent by weight of a partially cured, resin modified, cross-linked ureaformaldehyde resin; a second ply made of paper; and means bonding said second ply in face-to-face relationship with said first ply and leaving exposed a surface of the second ply on which selected information can be placed.
Claim 2
Dependent Claim
79 words
A flexible visible index strip of multiple ply construction which has smooth edges and comprises a first, strong, flexible ply composed of a fibrous, cellulosic mat impregnated with from 25 to 75 percent by weight of a partially cured, resin modified, cross-linked ureaformaldehyde resin; a second ply made of paper; and means bonding said second ply in face-to-face relationship with said first ply and leaving exposed a surface of the second ply on which selected information can be placed.
Claim 3
Dependent Claim
55 words
A visible index strip of multiple ply construction as defined in claim 1 which has a third ply made of paper and means permanently so bonding said third ply in face-to-face relationship to said first ply on the opposite side thereof from the second ply as to impart flexibility and strength to the index strip.
References Cited (Backward Citations)
US1185538A
Cited
US2201950A
Cited
US3383121A
Cited
US3769143A
Cited
US3778914A
Cited
US3837999A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |