US3279074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isometric drafting instruments
Assignee: Individual
•
Filing: 1963-11-29
•
Granted: 1966-10-18
•
Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 Sr Daniel Joseph Mcquaid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:01
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A DRAFTING INSTRUMENT FOR MAKING ISOMETRIC DRAWINGS, INCLUDING THE PRINCIPAL AXES OF AN ISOMETRIC CUBE AND THE MAJOR AND MINOR AXES OF ISOMETRIC ELLIPSES REPRESENTING CIRCLES INSCRIBED IN ANY FACE OF SAID CUBE, COMPRISING: A PLANAR, TRIANGULAR MEMBER HAVING ANGLES OF 30*, 60* AND 90* AT THE CORNERS AND A HYPOTENUSE OUTSIDE EDGE OPPOSITE SAID 90* ANGLE; SAID MEMBER HAVING A TRIANGULAR APERTURE HAVING EQUAL SIDES AND EQUAL INTERIOR ANGLES, WITH ONE OF SAID APERTURE SIDES BEING PERPENDICULAR TO SAID HYPOTENUSE EDGE; WHEREBY SAID MEMBER MAY BE PLACED AGAINST A STRAIGHT EDGE OR THE LIKE TO ENABLE THE THREE AXES OF AN ISOMETRIC CUBE AND LINES PARALLEL TO ANY OF SAID AXES TO BE DRAWN AND ALSO TO ENABLE THE MAJOR AND MINOR AXES OF AN ELLIPSE CONTAINED IN ANY OF THE THREE FACES OF SAID CUBE TO BE DRAWN WITH THE OUTSIDE EDGE INTERMEDIATE IN LENGTH ENGAGING SAID STRAIGHT EDGE AND SAID 30* ANGLE POINTED IN ONE DIRECTION OR IN THE OPPOSITE DIRECTION.
Claim 2
Dependent Claim
164 words
A DRAFTING INSTRUMENT FOR MAKING ISOMETRIC DRAWINGS, INCLUDING THE PRINCIPAL AXES OF AN ISOMETRIC CUBE AND THE MAJOR AND MINOR AXES OF ISOMETRIC ELLIPSES REPRESENTING CIRCLES INSCRIBED IN ANY FACE OF SAID CUBE, COMPRISING: A PLANAR, TRIANGULAR MEMBER HAVING ANGLES OF 30*, 60* AND 90* AT THE CORNERS AND A HYPOTENUSE OUTSIDE EDGE OPPOSITE SAID 90* ANGLE; SAID MEMBER HAVING A TRIANGULAR APERTURE HAVING EQUAL SIDES AND EQUAL INTERIOR ANGLES, WITH ONE OF SAID APERTURE SIDES BEING PERPENDICULAR TO SAID HYPOTENUSE EDGE; WHEREBY SAID MEMBER MAY BE PLACED AGAINST A STRAIGHT EDGE OR THE LIKE TO ENABLE THE THREE AXES OF AN ISOMETRIC CUBE AND LINES PARALLEL TO ANY OF SAID AXES TO BE DRAWN AND ALSO TO ENABLE THE MAJOR AND MINOR AXES OF AN ELLIPSE CONTAINED IN ANY OF THE THREE FACES OF SAID CUBE TO BE DRAWN WITH THE OUTSIDE EDGE INTERMEDIATE IN LENGTH ENGAGING SAID STRAIGHT EDGE AND SAID 30* ANGLE POINTED IN ONE DIRECTION OR IN THE OPPOSITE DIRECTION.
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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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |