US3253780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: —
•
Filing: —
•
Granted: 1966-05-31
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Expires: 1983-05-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:18
CPC Classifications
G; G06; G06G; G06G1/00; G06G1/0005; G06G1/0015
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A CALCULATOR COMPRISING, (A) AN OPAQUE DISC BASE MEMBER CARRYING FIRST REFERENCE MARKINGS, (B) A PLURALITY OF TRANSPARENT DISC MEMBERS SUPERPOSED OVER EACH OTHER AND THE BASE MEMBER, EACH TRANSPARENT MEMBER CARRYING A FIDUCIAL MARK AND A PERIODICALLY-VARYING CURVE REPRESENTING A VARIABLE FACTOR WHICH IS RELATED TO SAID FIRST REFERENCE MARKINGS, (C) A CURSOR MEMBER OVERLYING THE TRANSPARENT MEMBERS AND HAVING A WINDOW EXPOSING TO VIEW A PORTION OF SAID FIRST REFERENCE MARKINGS AND PORTIONS OF THE CURVES CARRIED BY THE TRANSPARENT DISC MEMBERS, SAID MEMBER CARRYING A FIDUCIAL MARK AND SECOND REFERENCE MARKINGS HAVING A PREDETERMINED RELATION TO THE SAID FIRST REFERENCE MARKINGS, AND (D) MEANS SECURING TOGETHER ALL OF THE SAID MEMBERS WHILE AFFORDING MOVEMENT OF EACH MEMBER RELATIVE TO ALL OF THE OTHER MEMBERS ABOUT A COMMON AXIS.
Claim 2
Dependent Claim
131 words
A CALCULATOR COMPRISING, (A) AN OPAQUE DISC BASE MEMBER CARRYING FIRST REFERENCE MARKINGS, (B) A PLURALITY OF TRANSPARENT DISC MEMBERS SUPERPOSED OVER EACH OTHER AND THE BASE MEMBER, EACH TRANSPARENT MEMBER CARRYING A FIDUCIAL MARK AND A PERIODICALLY-VARYING CURVE REPRESENTING A VARIABLE FACTOR WHICH IS RELATED TO SAID FIRST REFERENCE MARKINGS, (C) A CURSOR MEMBER OVERLYING THE TRANSPARENT MEMBERS AND HAVING A WINDOW EXPOSING TO VIEW A PORTION OF SAID FIRST REFERENCE MARKINGS AND PORTIONS OF THE CURVES CARRIED BY THE TRANSPARENT DISC MEMBERS, SAID MEMBER CARRYING A FIDUCIAL MARK AND SECOND REFERENCE MARKINGS HAVING A PREDETERMINED RELATION TO THE SAID FIRST REFERENCE MARKINGS, AND (D) MEANS SECURING TOGETHER ALL OF THE SAID MEMBERS WHILE AFFORDING MOVEMENT OF EACH MEMBER RELATIVE TO ALL OF THE OTHER MEMBERS ABOUT A COMMON AXIS.
References Cited (Backward Citations)
US2437621A
Cited
US3084858A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |