Patent US3560092A successfully refreshed from Google Patents.
US3560092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clipboard with slate surface
Assignee: Individual
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Filing: 1968-07-24
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Granted: 1971-02-02
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Expires: 1988-07-24
Abstract
Abstract A RECTANGULAR SHAPED BOARD WHOSE SURFACE ON BOTH SIDES THEREOF IS OF SLATE OR OTHER MATERIAL THAT WILL ACCEPT CHALK AS THE WRITING MEDIUM THEREOF. INDICIA OF A BASKETBALL COURT, FOOTBALL FIELD OR OTHER FIELD OF ATHLETIC CONTEST ARE ALIGNED IN THE LONGITUDINAL DIRECTION OF THE BOARD WITH A CLIP AT ONE END THEREOF TO HOLD OVERLYING PAPERS OR OTHER MATERIALS.
Inventors
- 👤 L J Coney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:50
CPC Classifications
B; B42; B42F; B42F9/00; B42F9/001; Y; Y10; Y10T; Y10T24/00; Y10T24/20; Y10T24/202; Y10T24/203; Y10T24/204
Claims Analysis
Total Claims: 0
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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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |