Patent US3136074A successfully refreshed from Google Patents.
US3136074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational device
Assignee: Individual
•
Filing: 1962-02-20
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Granted: 1964-06-09
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Expires: 1982-02-20
Abstract
No abstract record available.
Inventors
- 👤 Barbara J Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:16
CPC Classifications
G; G09; G09B; G09B3/00; G09B3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
AN EDUCATIONAL DEVICE COMPRISING A BODY MEMBER HAVING A PROBLEM WINDOW AND AN ANSWER WINDOW, AND ANSWER CHECKING WINDOWS ADJACENT TO SAID PROBLEM AND ANSWER WINDOWS; A PROBLEM DISK ROTATABLY MOUNTED WITHIN THE BODY MEMBER HAVING PROBLEM INDICIA AND ANSWER CHECKING INDICIA THEREON REGISTERABLE WITH THE PROBLEM WINDOW AND THE ADJACENT ANSWER CHECKING WINDOW RESPECTIVELY; AN ANSWER DISK ROTATABLY MOUNTED IN THE BODY MEMBER HAVING ANSWERING INDICIA AND ANSWER CHECKING INDICIA THEREON REGISTERABLE WITH THE ANSWER WINDOW AND THE ADJACENT ANSWER CHECKING WINDOW RESPECTIVELY; AND CONCEALING MEANS RECIPROCABLY MOUNTED IN SAID BODY MEMBER BETWEEN SAID ANSWER CHECKING WINDOWS AND SAID DISKS FOR MOVEMENT BETWEEN A POSITION COVERING SAID ANSWER CHECKING INDICIA, AND A RETRACTED POSITION WHEREBY THE ANSWER CHECKING INDICIA ARE VISIBLE THROUGH THEIR RESPECTIVE WINDOWS.
Claim 2
Dependent Claim
126 words
AN EDUCATIONAL DEVICE COMPRISING A BODY MEMBER HAVING A PROBLEM WINDOW AND AN ANSWER WINDOW, AND ANSWER CHECKING WINDOWS ADJACENT TO SAID PROBLEM AND ANSWER WINDOWS; A PROBLEM DISK ROTATABLY MOUNTED WITHIN THE BODY MEMBER HAVING PROBLEM INDICIA AND ANSWER CHECKING INDICIA THEREON REGISTERABLE WITH THE PROBLEM WINDOW AND THE ADJACENT ANSWER CHECKING WINDOW RESPECTIVELY; AN ANSWER DISK ROTATABLY MOUNTED IN THE BODY MEMBER HAVING ANSWERING INDICIA AND ANSWER CHECKING INDICIA THEREON REGISTERABLE WITH THE ANSWER WINDOW AND THE ADJACENT ANSWER CHECKING WINDOW RESPECTIVELY; AND CONCEALING MEANS RECIPROCABLY MOUNTED IN SAID BODY MEMBER BETWEEN SAID ANSWER CHECKING WINDOWS AND SAID DISKS FOR MOVEMENT BETWEEN A POSITION COVERING SAID ANSWER CHECKING INDICIA, AND A RETRACTED POSITION WHEREBY THE ANSWER CHECKING INDICIA ARE VISIBLE THROUGH THEIR RESPECTIVE WINDOWS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |