Patent US4818215A successfully refreshed from Google Patents.
US4818215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally color-changing candleholder
Assignee: Pilot Ink Co Ltd
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Filing: 1988-03-16
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Granted: 1989-04-04
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Expires: 2008-03-16
Abstract
Abstract A candleholder having an improved ornamentation effect. A hollow shell, shaped in the form of an animal, fruit, building, etc., is heated by a candle positioned in its internal cavity. At least a portion of the shell is covered with a thermally color-changing material formed in a desired pattern. When the shell is heated by burning a candle, the pattern seen by the view thus changes.
Inventors
- 👤 Hideji Taga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:56
CPC Classifications
F; F21; F21V; F21V35/00; F21S; F21S10/00; F21S10/02; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
54 words
A candleholder comprising: a shell shaped to simulate an external appearance of a predetermined object, said shell having a hollow interior chamber for accommodating a candle and an opening communicating with said chamber; and a layer of a thermally color-changing material formed on at least a portion of an outer surface of said shell.
Claim 2
Dependent Claim
54 words
A candleholder comprising: a shell shaped to simulate an external appearance of a predetermined object, said shell having a hollow interior chamber for accommodating a candle and an opening communicating with said chamber; and a layer of a thermally color-changing material formed on at least a portion of an outer surface of said shell.
Claim 3
Dependent Claim
25 words
The candleholder of claim 1, wherein said shell is made of a material selected from the group consisting of ceramics, glass enameled ware and metal.
Claim 4
Dependent Claim
25 words
The candleholder of claim 1, further comprising a layer of thermally non-color-changing material provided on at least portions of said outer surface of said shell.
Claim 5
Dependent Claim
24 words
The candleholder of claim 3, wherein at least a portion of said thermally non-color-changing material is formed under said layer of thermally color-changing material.
Claim 6
Dependent Claim
31 words
The candleholder of claim wherein at least a portion of said thermally non-color-changing material is formed side by side with respect to at least a portion of said thermally color-changing layer.
Claim 7
Dependent Claim
38 words
The candleholder of claim 3, wherein at least a portion of one of said thermally color-changing material and said thermally non-color-changing material is in the form of a message which appears when said thermally color-changing layer is heated.
Claim 8
Dependent Claim
43 words
The candleholder of claim 3, wherein at least a portion of said thermally color-changing layer and said thermally non-color-changing layer are of the same color at normal room temperature and of different colors when said shell is heated by burning a candle therein.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |