US4017725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar powered portable calculator
Assignee: Monroe Systems for Business Inc
•
Filing: 1975-01-03
•
Granted: 1977-04-12
•
Expires: 1995-01-03
Abstract
Abstract A portable calculator utilizing a solar panel array which can be either slidably moved within the calculator's housing or pivotly connected to it and which when exposed to incident light provide power for the calculator.
Inventors
- 👤 Stephen A. Roen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:43
CPC Classifications
G; G06; G06F; G06F15/00; G06F15/02; G06F15/0216; Y; Y10; Y10S; Y10S136/00; Y10S136/291
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
58 words
A portable calculator comprising: a housing having a keyboard and indicator means thereon; solar panel means; and means for allowing movement of said solar panel means, coupled to said housing, from a first position within said housing to a second position exposing said solar panel means, comprising a rail-channel guide means for slidably moving said solar panel means.
Claim 2
Dependent Claim
58 words
A portable calculator comprising: a housing having a keyboard and indicator means thereon; solar panel means; and means for allowing movement of said solar panel means, coupled to said housing, from a first position within said housing to a second position exposing said solar panel means, comprising a rail-channel guide means for slidably moving said solar panel means.
Claim 3
Dependent Claim
38 words
A portable calculator according to claim 1 wherein said means for allowing movement of said solar panel means exposes said panel means to incident light in substantially the same orientation as said keyboard is exposed to incident light.
Claim 4
Dependent Claim
69 words
A portable calculator comprising: a housing having a keyboard and indicator means thereon; solar panel means; and means for allowing movement of said solar panel means, coupled to said housing, from a first position within said housing to a second position exposing said solar panel means, comprising pivoting means connected at one end to one edge of said housing and at the other end to said solar panel means.
Claim 5
Dependent Claim
69 words
A portable calculator comprising: a housing having a keyboard and indicator means thereon; solar panel means; and means for allowing movement of said solar panel means, coupled to said housing, from a first position within said housing to a second position exposing said solar panel means, comprising pivoting means connected at one end to one edge of said housing and at the other end to said solar panel means.
Claim 6
Dependent Claim
32 words
A portable calculator according to claim 3, wherein said solar panel means are pivotably connected to each other whereby they are horizontally oriented with respect said housing when in said second position.
Claim 7
Dependent Claim
35 words
A portable calculator according to claim 3 wherein said means for allowing movement of said solar panel means exposes said panel means in substantially the same orientation as said keyboard is exposed to incident light.
Claim 8
Dependent Claim
59 words
A portable calculator comprising: a housing having a keyboard and indicator means thereon; solar panel means; means for allowing movement of said solar panel means, coupled to said housing, from a first position within said housing to a second position exposing said solar panel means; and switching means for connecting said solar panel means to power said portable calculator.
Claim 9
Dependent Claim
59 words
A portable calculator comprising: a housing having a keyboard and indicator means thereon; solar panel means; means for allowing movement of said solar panel means, coupled to said housing, from a first position within said housing to a second position exposing said solar panel means; and switching means for connecting said solar panel means to power said portable calculator.
Claim 10
Dependent Claim
38 words
A portable calculator according to claim 6, additionally comprising; connecting means for connecting a battery power supply to operate said calculator and wherein said switching means is coupled to said connecting means, for trickle charging said power supply.
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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) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |