US2955364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chalkboards
Assignee: Continental Can Co Inc
•
Filing: 1956-10-08
•
Granted: 1960-10-11
•
Expires: 1976-10-08
Abstract
No abstract record available.
Inventors
- 👤 Fred B Shaw
- 👤 Jack S Schlueter
- 👤 John R Guenther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:18
CPC Classifications
B; B43; B43L; B43L1/00; B43L1/04; B43L1/10; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/261; Y10T428/31; Y10T428/31504; Y10T428/31786; Y10T428/3179
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A CHALKBOARD FORMED FROM A POLYSTER RESIN LAMINATE AND HAVING POLYSTER RESIN OVERLAY OF A THICKNESS NOT OVER 0.005 OF AN INCH FILLED WITH REINFORCING FINELY GROUND MATERIAL, THE EXPOSED SURFACE OF SAID OVERLAY BEING PROVIDED WITH A MATTE FINISH WHICH IS CHALK-RETAINING WHILE BEING READILY ERASABLE, THE POLYSTER RESIN BEING THE POLYMERIZATION PRODUCTS OF POLYHYDRIC ALCOHOL ESTERS OF UNSATURATED DIBASIC ACID.
Claim 2
Dependent Claim
62 words
A CHALKBOARD FORMED FROM A POLYSTER RESIN LAMINATE AND HAVING POLYSTER RESIN OVERLAY OF A THICKNESS NOT OVER 0.005 OF AN INCH FILLED WITH REINFORCING FINELY GROUND MATERIAL, THE EXPOSED SURFACE OF SAID OVERLAY BEING PROVIDED WITH A MATTE FINISH WHICH IS CHALK-RETAINING WHILE BEING READILY ERASABLE, THE POLYSTER RESIN BEING THE POLYMERIZATION PRODUCTS OF POLYHYDRIC ALCOHOL ESTERS OF UNSATURATED DIBASIC ACID.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |