Patent US924508A successfully refreshed from Google Patents.
Patent US3225937A successfully refreshed from Google Patents.
US3225937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shelf construction
Assignee: HAMILTON INDUSTRIES Inc
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Filing: 1963-04-05
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Granted: 1965-12-28
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Expires: 1983-04-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Franklin R Amthor
- 👤 James M Katzfey
- 👤 Roy E Kanitz
- 👤 George L Schaefer
- 👤 Reuben P Kodet
- 👤 Haban Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:59
CPC Classifications
A; A47; A47B; A47B65/00; A47B65/10; A47B57/00; A47B57/30; A47B47/00; A47B47/02; A47B47/021; A47B63/00; A47B96/00; A47B96/02; A47B96/024; A47B96/027; A47B96/028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A MILDEW PREVENTING SHELF FOR SUPPORTING BOOKS COMPRISING A BOTTOM MEMBER HAVING AN UPPER BOOK SUPPORTING SURFACE, AND A BACK MEMBER EXTENDING UPWARDLY FROM THE REARWARD EDGE OF SAID BOTTOM MEMBER, SAID BACK MEMBER HAVING A RELATIVELY FLAT UPPER PORTION ADAPTED TO ENGAGE THE BOOKS ON SAID SURFACE, SAID RELATIVELY FLAT UPPER PORTION LYING ON A LINE EXTENDING PERPENDICULARLY FROM A POINT ON SAID SUPPORTING SURFACE SPACED FORWARDLY FROM THE REARWARD EDGE OF SAID BOTTOM MEMBER, AND A LOWER PORTION EXTENDING BETWEEN SAID UPPER PORTION AND THE REARWARD EDGE OF SAID BOTTOM MEMBER AND SPACED REARWARDLY FROM SAID PERPENDICULAR LINE AND FROM THE BOOKS ON SAID SURFACE, WHEREBY AN AIR POCKET IS FORMED BETWEEN SAID LOWER PORTION OF SAID BACK MEMBER AND THE BOOKS, SAID AIR POCKET PERMITTING AIR CIRCULATION AROUND THE BOOKS AND HENCE PREVENTING MILDEW FROM FORMING.
Claim 2
Dependent Claim
139 words
A MILDEW PREVENTING SHELF FOR SUPPORTING BOOKS COMPRISING A BOTTOM MEMBER HAVING AN UPPER BOOK SUPPORTING SURFACE, AND A BACK MEMBER EXTENDING UPWARDLY FROM THE REARWARD EDGE OF SAID BOTTOM MEMBER, SAID BACK MEMBER HAVING A RELATIVELY FLAT UPPER PORTION ADAPTED TO ENGAGE THE BOOKS ON SAID SURFACE, SAID RELATIVELY FLAT UPPER PORTION LYING ON A LINE EXTENDING PERPENDICULARLY FROM A POINT ON SAID SUPPORTING SURFACE SPACED FORWARDLY FROM THE REARWARD EDGE OF SAID BOTTOM MEMBER, AND A LOWER PORTION EXTENDING BETWEEN SAID UPPER PORTION AND THE REARWARD EDGE OF SAID BOTTOM MEMBER AND SPACED REARWARDLY FROM SAID PERPENDICULAR LINE AND FROM THE BOOKS ON SAID SURFACE, WHEREBY AN AIR POCKET IS FORMED BETWEEN SAID LOWER PORTION OF SAID BACK MEMBER AND THE BOOKS, SAID AIR POCKET PERMITTING AIR CIRCULATION AROUND THE BOOKS AND HENCE PREVENTING MILDEW FROM FORMING.
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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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |