US4835475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery tester including a thermochromic material
Assignee: Sakura Color Products Corp
•
Filing: 1987-10-07
•
Granted: 1989-05-30
•
Expires: 2007-10-07
Abstract
Abstract This invention provides an apparatus for indicating the electromotive force of a dry battery which comprises: (i) a film base; (ii) an electrically conductive layer disposed on one side of the film base, (iii) a protective layer disposed on the electrically conductive layer, and (iv) a thermochromic layer disposed on the other side of the film base.
Inventors
- 👤 Niichi Hanakura
- 👤 Ryuichiro Nagaoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:36
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/145; G01R19/155; G01D; G01D7/00; G01D7/005; B; B29; B29C; B29C67/00; B29C67/0007; G01K; G01K11/00; G01K11/12; G01K11/16; G01R13/00; G01R13/40; G01R13/401; G01R13/403; H; H01; H01M; H01M10/00; H01M10/42; H01M10/48; H01M6/00; H01M6/50; H01M6/5044; H01M6/505; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
67 words
An apparatus for indicating the electromotive force of a dry battery which comprises: (i) a film base, (ii) an electrically conductive layer disposed on one side of said film base, (iii) a protective layer disposed on said electrically conductive layer, and (iv) a thermochromic layer disposed on the other side of said film base, said thermochromic layer including a dye, a color developer and a desensitizing agent.
Claim 2
Independent Claim
67 words
An apparatus for indicating the electromotive force of a dry battery which comprises: (i) a film base, (ii) an electrically conductive layer disposed on one side of said film base, (iii) a protective layer disposed on said electrically conductive layer, and (iv) a thermochromic layer disposed on the other side of said film base, said thermochromic layer including a dye, a color developer and a desensitizing agent.
Claim 3
Dependent Claim
33 words
An apparatus for indicating the electromotive force of a dry battery as claimed in claim 1 wherein said electrically conductive layer varies in electrical resistivity from its central portion to its terminal portions.
Claim 4
Dependent Claim
30 words
An apparatus for indicating the electromotive force of a dry battery as claimed in claim 1 wherein said thermochromic layer consists of thermochromic segments which change color at different temperatures.
Claim 5
Independent Claim
77 words
An apparatus for indicating the electromotive force of a dry battery which comprises: (i) a film base, (ii) an electrically conductive layer disposed on one side of said film base, (iii) a protective layer disposed on said electrically conductive layer, and (iv) a non-thermochromic layer disposed on the other side of said film base, and (v) a thermochromic layer disposed on said non-thermochromic layer, said thermochromic layer including a dye, a color developer and a desensitizing agent.
Claim 6
Independent Claim
77 words
An apparatus for indicating the electromotive force of a dry battery which comprises: (i) a film base, (ii) an electrically conductive layer disposed on one side of said film base, (iii) a protective layer disposed on said electrically conductive layer, and (iv) a non-thermochromic layer disposed on the other side of said film base, and (v) a thermochromic layer disposed on said non-thermochromic layer, said thermochromic layer including a dye, a color developer and a desensitizing agent.
Claim 7
Dependent Claim
33 words
An apparatus for indicating the electromotive force of a dry battery as claimed in claim 4 wherein said electrically conductive layer varies in electrical resistivity from its central portion to its terminal portions.
Claim 8
Dependent Claim
30 words
An apparatus for indicating the electromotive force of a dry battery as claimed in claim 4 wherein said thermochromic layer consists of thermochromic segments which change color at different temperatures.
Claim 9
Dependent Claim
29 words
An apparatus for indicating the electromotive force of a dry battery as claimed in claim 4 wherein said thermochromic layer consists of segments containing thermochromic materials of different colors.
Claim 10
Independent Claim
63 words
An apparatus for indicating the electromotive force of a dry battery which comprises: (i) a film base, (ii) an electrically conductive layer disposed one side of said film base, (iii) a thermochromic layer disposed on said electrically conductive layer, said thermochromic layer including a dye, a color developer and a desensitizing agent, and (iv) a protective layer optionally disposed on said thermochromic layer.
Claim 11
Independent Claim
63 words
An apparatus for indicating the electromotive force of a dry battery which comprises: (i) a film base, (ii) an electrically conductive layer disposed one side of said film base, (iii) a thermochromic layer disposed on said electrically conductive layer, said thermochromic layer including a dye, a color developer and a desensitizing agent, and (iv) a protective layer optionally disposed on said thermochromic layer.
Claim 12
Dependent Claim
33 words
An apparatus for indicating the electromotive force of a dry battery as claimed in claim 8 wherein said electrically conductive layer varies in electrical resistivity form its central portion to its terminal portions.
Claim 13
Dependent Claim
30 words
An apparatus for indicating the electromotive force of a dry battery as claimed in claim 8 wherein said thermochromic layer consists of thermochromic segments which change color at different temperatures.
Claim 14
Independent Claim
73 words
An apparatus for indicating the electromotive force of a dry battery which comprises: (i) a film base, (ii) an electrically conductive layer disposed on one side of said film base, (iii) a non-thermochromic layer disposed on said electrically conductive layer, (iv) a thermochromic layer disposed on said non-thermochromic layer, said thermochromic layer including a dye, a color developer and a desensitizing agent, and (iii) a protective layer optionally disposed on said nonthermochromic layer.
Claim 15
Independent Claim
73 words
An apparatus for indicating the electromotive force of a dry battery which comprises: (i) a film base, (ii) an electrically conductive layer disposed on one side of said film base, (iii) a non-thermochromic layer disposed on said electrically conductive layer, (iv) a thermochromic layer disposed on said non-thermochromic layer, said thermochromic layer including a dye, a color developer and a desensitizing agent, and (iii) a protective layer optionally disposed on said nonthermochromic layer.
Claim 16
Dependent Claim
33 words
An apparatus for indicating the electromotive force of a dry battery as claimed in claim 11 wherein said electrically conductive layer varies in electrical resistivity from its central portion to its terminal portions
Claim 17
Dependent Claim
30 words
An apparatus for indicating the electromotive force to a dry battery as claimed in claim 11 wherein said thermochromic layer consists of thermochromic segments which change color at different temperatures.
Claim 18
Dependent Claim
29 words
An apparatus for indicating the electromotive force of a dry battery as claimed in claim 11 wherein said thermochromic layer consists of segments containing thermochromic materials of different colors.
Claim 19
Independent Claim
64 words
An apparatus for indicating the electromotive force of a dry battery which comprises: (i) a film base, (ii) a thermochromic layer disposed on one side of said film base, said thermochromic layer including a dye, a color developer and a desensitizing agent (iii) an electrically conductive layer disposed on said thermochromic layer, and (iv) a protective layer optionally disposed on said electrically conductive layer.
Claim 20
Independent Claim
64 words
An apparatus for indicating the electromotive force of a dry battery which comprises: (i) a film base, (ii) a thermochromic layer disposed on one side of said film base, said thermochromic layer including a dye, a color developer and a desensitizing agent (iii) an electrically conductive layer disposed on said thermochromic layer, and (iv) a protective layer optionally disposed on said electrically conductive layer.
Claim 21
Dependent Claim
33 words
An apparatus for indicating the electromotive force of a dry battery as claimed in claim 15 wherein said electrically conductive layer varies in electrical resistivity from its central portion to its terminal portions.
Claim 22
Dependent Claim
30 words
An apparatus for indicating the electromotive force of a dry battery as claimed in claim 15 wherein said thermochromic layer consists of thermochromic segments which change color at different temperatures.
Claim 23
Independent Claim
73 words
An apparatus for indicating the electromotive force of a dry battery which comprises: (i) a film base, (ii) a thermochromic layer disposed on one side of said film base, said thermochromic layer including a dye, a color developer and a desensitizing agent (iii) a non-thermochromic layer disposed on said thermochromic layer, (iv) an electrically conductive layer disposed on said non-thermochromic layer, and (v) a protective layer optionally disposed on said electrically conductive layer.
Claim 24
Independent Claim
73 words
An apparatus for indicating the electromotive force of a dry battery which comprises: (i) a film base, (ii) a thermochromic layer disposed on one side of said film base, said thermochromic layer including a dye, a color developer and a desensitizing agent (iii) a non-thermochromic layer disposed on said thermochromic layer, (iv) an electrically conductive layer disposed on said non-thermochromic layer, and (v) a protective layer optionally disposed on said electrically conductive layer.
Claim 25
Dependent Claim
33 words
An apparatus for indicating the electromotive force of a dry battery as claimed in claim 18 wherein said electrically conductive layer varies in electrical resistivity from its central portion to its terminal portions.
Claim 26
Dependent Claim
30 words
An apparatus for indicating the electromotive force of a dry battery as claimed in claim 18 wherein said thermochromic layer consists of thermochromic segments which change color at different temperatures.
Claim 27
Dependent Claim
29 words
An apparatus for indicating the electromotive force of a dry battery as claimed in claim 18 wherein said thermochromic layer consists of segments containing thermochromic materials of different colors.
References Cited (Backward Citations)
US4045383A
Cited
US4702564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |