Patent US4375296A successfully refreshed from Google Patents.
US4375296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clipboard
Assignee: Individual
•
Filing: 1981-07-31
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Granted: 1983-03-01
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Expires: 2001-07-31
Abstract
Abstract A clipboard comprises a backing board, a clip mount attached to one end of the backing board, and a clip pivoted at the clip mount. The clip mount has an elevated portion indented with two spaced grooves each receiving an insert. These two inserts receive two coil springs which are sleeved and secured on both ends of the clip. Two holes are bored through the clip mount and backing board near the sideward free ends of the grooves. The free end of the coil spring extends through the hole and is stopped on the rear side of the backing board.
Inventors
- 👤 Shih H. Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:36
CPC Classifications
B; B43; B43L; B43L3/00; B43L3/004; Y; Y10; Y10T; Y10T24/00; Y10T24/20; Y10T24/202; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
A clipboard, comprising: a backing board; at least two inserts; a clip mount attached to one end of said backing board, said clip mount having an elevated portion and two grooves, said grooves located on each side of said elevated portion and said inserts being inserted in said grooves; a clip said clip mount and said backing board having two sets of adjacent openings therethrough; two coil springs extending through said openings and being stopped at the rear side of said backing board, said clip being telescopically received in and attached to said springs and each of said springs being telescopically received in one of said inserts.
Claim 2
Dependent Claim
107 words
A clipboard, comprising: a backing board; at least two inserts; a clip mount attached to one end of said backing board, said clip mount having an elevated portion and two grooves, said grooves located on each side of said elevated portion and said inserts being inserted in said grooves; a clip said clip mount and said backing board having two sets of adjacent openings therethrough; two coil springs extending through said openings and being stopped at the rear side of said backing board, said clip being telescopically received in and attached to said springs and each of said springs being telescopically received in one of said inserts.
Claim 3
Dependent Claim
26 words
A clipboard as claimed in claim 1 wherein said backing board and said clip mount are integral with each other by molding them into one piece.
Claim 4
Dependent Claim
24 words
A clipboard as claimed in claim 1 or 2 wherein said grooves contract at the end of said grooves fartherest from said elevated portion.
Claim 5
Dependent Claim
33 words
A clipboard as claimed in claims 1, or 2 wherein said two holes are bored through said clip mount and said backing near the ends of said grooves farthest from said elevated portion.
Claim 6
Dependent Claim
44 words
A clipboard as claimed in claim 1, or 2, wherein each of said inserts has two opposing, spaced apart sides, each of said sides having a tongue extending therefrom and said tongues being diagonally opposite to each other and perpendicular to the opposing side.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-28 | 1986-08-30 | 1987-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-28 | 1990-08-30 | 1991-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-28 | 1994-08-30 | 1995-03-01 | $7700.00 | Window Closed / Lapsed |