US5451743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating tile
Assignee: Denel Pty Ltd
•
Filing: 1992-11-17
•
Granted: 1995-09-19
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Expires: 2012-11-17
Abstract
Abstract Heating tiles have electrical resistance wires on their under surfaces which are covered with a non-conducting sheet, adjacent tiles being physically and electrically connected to provide any chosen area for heating such as the bottom of a bird cage, kennel or for heating blankets.
Inventors
- 👤 Johannes J. du Preez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:24
CPC Classifications
F; F24; F24D; F24D13/00; F24D13/02; F24D13/022; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
39 words
Heating tiles including a heating element comprising an electrical resistance circuit connectable to a source of electricity and incorporated into the tiles, the tiles being mechanically and electrically connectable to each other by means of interengaging tongues and grooves.
Claim 2
Dependent Claim
39 words
Heating tiles including a heating element comprising an electrical resistance circuit connectable to a source of electricity and incorporated into the tiles, the tiles being mechanically and electrically connectable to each other by means of interengaging tongues and grooves.
Claim 3
Dependent Claim
31 words
Heating tiles according to claim 1, in which the electrical resistance circuit is located on the undersurface of the tile and is covered on the undersurface thereof with a non-conducting layer.
Claim 4
Dependent Claim
16 words
Heating tiles according to claim 2, in which the electrical resistance circuit is applied by silkscreening.
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) | 1998-09-18 | 1999-03-20 | 1999-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-18 | 2003-03-20 | 2003-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-18 | 2007-03-20 | 2007-09-19 | $7700.00 | Window Closed / Lapsed |