Patent US3401422A successfully refreshed from Google Patents.
Patent US3202298A successfully refreshed from Google Patents.
US3202298A
Expired / Lapsed
US
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Book-end
Assignee: Individual
•
Filing: 1962-10-01
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Granted: 1965-08-24
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Expires: 1982-10-01
Abstract
No abstract record available.
Inventors
- 👤 Koreska Rudolf Johan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:54
CPC Classifications
A; A47; A47B; A47B57/00; A47B57/58; A47B57/583; A47B57/585
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A BOOK-END ADAPTED TO ENGAGE DISPLACEABLY IN GROOVES PROVIDED OPPOSITE EACH OTHER ON THE UNDERSIDE OF A FIRST BOOK-SHELF, COMPRISING AT LEAST ONE ELONGATED, SUBSTANTIALLY FLAT GUIDE MEMBER ENGAGING IN ONE OF SAID GROOVES, AND A DOWNWARDLY PROJECTING PORTION RIGID WITH SAID GUIDE MEMBER TO SUPPORT A BOOK OR THE LIKE ON A SECOND SHELF MOUNTED UNDERNEATH, SAID PROJECTING PORITION BEING IN CLOSE PROXIMITY TO ONE OF SAID GROOVES ON AT LEAST THE FRONTAL SIDE OF SAID FIRST SHELF, SAID GUIDE MEMBER HAVING A LENGTH THAT IS BETWEEN 30% AND 40% OF THE DISTANCE BETWEEN SAID GROOVES, SO THAT LATERAL PRESSURE APPLIED TO SAID PROJECTING PORTION IN A DIRECTION PERPENDICULAR TO A LINE CONNECTING SAID GROOVES, AND APPLIED JUST UNDER SAID FIRST SHELF, WILL CAUSE LATERAL SLIDING DISPLACEMENT OF THE BOOK-END WITHOUT TURNING ABOUT A VERTICAL AXIS, WHILE SIMILAR PRESSURE APPLIEED AT THE BOTTOM OF SAID PROJECTING PORTION, IN THE PROXIMITY OF SAID SECOND SHELF, WILL NOT CAUSE LATERAL DISPLACEMENT THEREOF OWING TO EXCESSIVE FRICTION ENCOUNTERED BETWEEN SAID GUIDE MEMBER AND THE ASSOCIATED GROOVE.
Claim 2
Dependent Claim
174 words
A BOOK-END ADAPTED TO ENGAGE DISPLACEABLY IN GROOVES PROVIDED OPPOSITE EACH OTHER ON THE UNDERSIDE OF A FIRST BOOK-SHELF, COMPRISING AT LEAST ONE ELONGATED, SUBSTANTIALLY FLAT GUIDE MEMBER ENGAGING IN ONE OF SAID GROOVES, AND A DOWNWARDLY PROJECTING PORTION RIGID WITH SAID GUIDE MEMBER TO SUPPORT A BOOK OR THE LIKE ON A SECOND SHELF MOUNTED UNDERNEATH, SAID PROJECTING PORITION BEING IN CLOSE PROXIMITY TO ONE OF SAID GROOVES ON AT LEAST THE FRONTAL SIDE OF SAID FIRST SHELF, SAID GUIDE MEMBER HAVING A LENGTH THAT IS BETWEEN 30% AND 40% OF THE DISTANCE BETWEEN SAID GROOVES, SO THAT LATERAL PRESSURE APPLIED TO SAID PROJECTING PORTION IN A DIRECTION PERPENDICULAR TO A LINE CONNECTING SAID GROOVES, AND APPLIED JUST UNDER SAID FIRST SHELF, WILL CAUSE LATERAL SLIDING DISPLACEMENT OF THE BOOK-END WITHOUT TURNING ABOUT A VERTICAL AXIS, WHILE SIMILAR PRESSURE APPLIEED AT THE BOTTOM OF SAID PROJECTING PORTION, IN THE PROXIMITY OF SAID SECOND SHELF, WILL NOT CAUSE LATERAL DISPLACEMENT THEREOF OWING TO EXCESSIVE FRICTION ENCOUNTERED BETWEEN SAID GUIDE MEMBER AND THE ASSOCIATED GROOVE.
References Cited (Backward Citations)
GB861645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |