US3390468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for illustrating the atomic structure of elements
Assignee: DANIEL S MITCHELL
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Filing: 1965-10-12
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Granted: 1968-07-02
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Expires: 1985-10-12
Abstract
No abstract record available.
Inventors
- 👤 Daniel S Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:30
CPC Classifications
G; G09; G09B; G09B23/00; G09B23/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A DEVICE FOR ILLUSTRATING THE ATOMIC STRUCTURE OF ELEMENTS, COMPRISING TWO COAXIAL MEMBERS INTERCONNECTED BY A CENTRAL PIVOT TO BE CAPABLE OF RELATIVE ROTATION, THE FIRST UPPR MEMBR BEING THIN AND HAVING A FLAT UPPER SURFACE ON WHICH ARE MARKED A SERIES OF CIRCLES REPRESENTING ELECTRON ORBITS AROUND A CENTRAL NUCLEUS AND IN WHICH ARE PROVIDED TWO PERFORATIONS IN EACH CIRCLE, SAID UPPER MEMBER ALSO PROVIDED WITH AT LEAST ONE WINDOW, AND THE SECOND LOWER MEMBER HAVING A FLAT UPPER SURFACE ON WHICH ARE PROVIDED MARKINGS WHICH CO-OPERATE WITH THE PERFORATIONS TO REPRESENT ELECTRONS IN THE ORBITS AND OTHER INFORMATION INDENTIFYING THE ELEMENTS WHICH MAY BE VIEWED THROUGH THE WINDOW.
Claim 2
Independent Claim
110 words
A DEVICE FOR ILLUSTRATING THE ATOMIC STRUCTURE OF ELEMENTS, COMPRISING TWO COAXIAL MEMBERS INTERCONNECTED BY A CENTRAL PIVOT TO BE CAPABLE OF RELATIVE ROTATION, THE FIRST UPPR MEMBR BEING THIN AND HAVING A FLAT UPPER SURFACE ON WHICH ARE MARKED A SERIES OF CIRCLES REPRESENTING ELECTRON ORBITS AROUND A CENTRAL NUCLEUS AND IN WHICH ARE PROVIDED TWO PERFORATIONS IN EACH CIRCLE, SAID UPPER MEMBER ALSO PROVIDED WITH AT LEAST ONE WINDOW, AND THE SECOND LOWER MEMBER HAVING A FLAT UPPER SURFACE ON WHICH ARE PROVIDED MARKINGS WHICH CO-OPERATE WITH THE PERFORATIONS TO REPRESENT ELECTRONS IN THE ORBITS AND OTHER INFORMATION INDENTIFYING THE ELEMENTS WHICH MAY BE VIEWED THROUGH THE WINDOW.
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) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |