Patent US4067370A successfully refreshed from Google Patents.
Patent US3777359A successfully refreshed from Google Patents.
US3777359A
Expired / Lapsed
US
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Method of making skeletal tetrahedrons
Assignee: Individual
•
Filing: 1972-03-31
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Granted: 1973-12-11
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Expires: 1992-03-31
Abstract
Abstract Skeletal tetrahedrons are formed by molding them in two halves and then joining the halves. Each half is comprised by a pair of triangles having a common base, the apices of the triangles being spaced apart a distance equal to the length of the base.
Inventors
- 👤 E Bardot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:28
CPC Classifications
G; G09; G09B; G09B23/00; G09B23/02; G09B23/04; Y; Y10; Y10S; Y10S52/00; Y10S52/10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49893; Y10T29/4998
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
79 words
A method of producing a skeletal tetrahedron, comprising forming by molding a plurality of identical components each comprised by a pair of skeletal triangles having a common base with the apices of the triangles spaced apart a distance equal to the length of the base, and then securing together a pair of said components with the components nested together and the base of each component extending between the apices of the triangles of the other component of the pair.
Claim 2
Independent Claim
79 words
A method of producing a skeletal tetrahedron, comprising forming by molding a plurality of identical components each comprised by a pair of skeletal triangles having a common base with the apices of the triangles spaced apart a distance equal to the length of the base, and then securing together a pair of said components with the components nested together and the base of each component extending between the apices of the triangles of the other component of the pair.
Claim 3
Dependent Claim
14 words
A method as claimed in claim 1, in which said triangles are equilateral triangles.
Claim 4
Dependent Claim
14 words
A method as claimed in claim 1, in which said triangles are isosceles triangles.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |