Patent US1864936A successfully refreshed from Google Patents.
Patent US3109240A successfully refreshed from Google Patents.
US3109240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perspective drawing instrument
Assignee: Individual
•
Filing: 1961-12-04
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Granted: 1963-11-05
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Expires: 1981-12-04
Abstract
No abstract record available.
Inventors
- 👤 Bernier Jean Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:03
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PERSPECTIVE DRAWING INSTRUMENT COMPRISING: A RECTILINEAR GUIDING TRACK; A TRAVELLING BODY; COOPERATING MEANS ON SAID TRACK AND BODY TO ENSURE POSITIVE DISPLACEMENT OF SAID BODY ON SAID TRACK; MANUAL DRIVING MEANS ON SAID BODY CONNECTED TO SAID COOPERATING MEANS TO CAUSE DISPLACEMENT OF THE BODY ON SAID TRACK; FIRST AND SECOND STRAIGHTEDGES PIVOTALLY MOUNTED, AT ONE END THEREOF, ON SAID BODY ON A COMMON AXIS NORMAL TO THE AXIS OF SAID TRACK; FIRST ACTUATING MEANS OPERATIVELY JOINED TO SAID MANUAL DRIVING MEANS AND TO SAID FIRST STRAIGHTEDGE TO PIVOT THE LATTER IN ANGULAR DISPLACEMENT PROPORTIONAL TO THE DISPLACEMENT OF SAID BODY; SECOND ACTUATING MEANS OPERATIVELY JOINED TO SAID FIRST ACTUATING MEANS AND TO SAID SECOND STRAIGHTEDGE TO CAUSE ANGULAR DISPLACEMENT THEREOF PROPORTIONAL TO THE ANGULAR DISPLACEMENT OF SAID FIRST STRAIGHTEDGE.
Claim 2
Dependent Claim
131 words
A PERSPECTIVE DRAWING INSTRUMENT COMPRISING: A RECTILINEAR GUIDING TRACK; A TRAVELLING BODY; COOPERATING MEANS ON SAID TRACK AND BODY TO ENSURE POSITIVE DISPLACEMENT OF SAID BODY ON SAID TRACK; MANUAL DRIVING MEANS ON SAID BODY CONNECTED TO SAID COOPERATING MEANS TO CAUSE DISPLACEMENT OF THE BODY ON SAID TRACK; FIRST AND SECOND STRAIGHTEDGES PIVOTALLY MOUNTED, AT ONE END THEREOF, ON SAID BODY ON A COMMON AXIS NORMAL TO THE AXIS OF SAID TRACK; FIRST ACTUATING MEANS OPERATIVELY JOINED TO SAID MANUAL DRIVING MEANS AND TO SAID FIRST STRAIGHTEDGE TO PIVOT THE LATTER IN ANGULAR DISPLACEMENT PROPORTIONAL TO THE DISPLACEMENT OF SAID BODY; SECOND ACTUATING MEANS OPERATIVELY JOINED TO SAID FIRST ACTUATING MEANS AND TO SAID SECOND STRAIGHTEDGE TO CAUSE ANGULAR DISPLACEMENT THEREOF PROPORTIONAL TO THE ANGULAR DISPLACEMENT OF SAID FIRST STRAIGHTEDGE.
References Cited (Backward Citations)
US2330414A
Cited
US2714253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |