US3221145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated heating sheet
Assignee: Armstrong World Industries Inc
•
Filing: 1963-09-06
•
Granted: 1965-11-30
•
Expires: 1983-09-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Nathaniel E Hager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:54
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/10; H05B3/12; H05B3/14; H05B3/146
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
198 words
IN AN ELECTRICAL HEATER COMPRISING OPPOSING ELECTRODES SEPARATED BY A SEMI-INSULATING ADHESIVE LAYER IN WHICH THE HEAT OUTPUT OF THE HEATER IS GENERATED BY THE PASSAGE OF ELECTRICAL CURRENT THERETHROUGH, THE IMPROVED STRUCTURE COMPRISING (1) A FIRST METAL FOIL SHEET ELECTRODE HAVING A POWER CONNECTION THEREON AND HAVING A RESISTIVITY R5 OHMINCHES, A THICKNESS T IN THE RANGE 0.0001-0.01 INCH, AND A LENGTH L INCHES FROM THE POWER CONNECTION TO THE FURTHERMOST END THEREOF, (2) A SECOND SHEET ELECTRODE HAVING A POWER CONNECTION THEREON AND BEING PARALLEL TO SAID FIRST ELECTRODE AND AT LEAST THE SAME THICKNESS THEREOF AND ADAPTED TO ESTABLISH A FLOW OF ELECTRICAL CURRENT FROM ONE ELECTRODE TO ANOTHER IN A DIRECTION PERPENDICULAR TO THE PLANES OF THE SHEET ELECTRODES WHEN A SUITABLE VOLTAGE IS ESTABLISHED ACROSS THE ELECTRODES, (3) A SEMI-INSULATING ADHESIVE LAYER OF THICKNESS D INCH AND RESISTIVITY RA OHM-INCHES IN THE RANGE 4X10**3 TO TO 4X10**7 SANDWICHED BETWEEN OPPOSING FACES OF SAID FIRST AND SECOND SHEET ELECTRODE AND BONDED TO THE OPPOSING FACES OF SAID ELECTRODES OVER SUBSTANTIALLY THE ENTIRE AREA THEREOF AND IN ELECTRICAL CONTACT THEREWITH, AND (4) SAID THICKNESS T INCH OF SAID FIRST ELECTRODE BEING ESTABLISHED BY THE RELATIONSHIP
Claim 2
Dependent Claim
198 words
IN AN ELECTRICAL HEATER COMPRISING OPPOSING ELECTRODES SEPARATED BY A SEMI-INSULATING ADHESIVE LAYER IN WHICH THE HEAT OUTPUT OF THE HEATER IS GENERATED BY THE PASSAGE OF ELECTRICAL CURRENT THERETHROUGH, THE IMPROVED STRUCTURE COMPRISING (1) A FIRST METAL FOIL SHEET ELECTRODE HAVING A POWER CONNECTION THEREON AND HAVING A RESISTIVITY R5 OHMINCHES, A THICKNESS T IN THE RANGE 0.0001-0.01 INCH, AND A LENGTH L INCHES FROM THE POWER CONNECTION TO THE FURTHERMOST END THEREOF, (2) A SECOND SHEET ELECTRODE HAVING A POWER CONNECTION THEREON AND BEING PARALLEL TO SAID FIRST ELECTRODE AND AT LEAST THE SAME THICKNESS THEREOF AND ADAPTED TO ESTABLISH A FLOW OF ELECTRICAL CURRENT FROM ONE ELECTRODE TO ANOTHER IN A DIRECTION PERPENDICULAR TO THE PLANES OF THE SHEET ELECTRODES WHEN A SUITABLE VOLTAGE IS ESTABLISHED ACROSS THE ELECTRODES, (3) A SEMI-INSULATING ADHESIVE LAYER OF THICKNESS D INCH AND RESISTIVITY RA OHM-INCHES IN THE RANGE 4X10**3 TO TO 4X10**7 SANDWICHED BETWEEN OPPOSING FACES OF SAID FIRST AND SECOND SHEET ELECTRODE AND BONDED TO THE OPPOSING FACES OF SAID ELECTRODES OVER SUBSTANTIALLY THE ENTIRE AREA THEREOF AND IN ELECTRICAL CONTACT THEREWITH, AND (4) SAID THICKNESS T INCH OF SAID FIRST ELECTRODE BEING ESTABLISHED BY THE RELATIONSHIP
References Cited (Backward Citations)
US2340097A
Cited
US2619443A
Cited
US2935711A
Cited
US2845519A
Cited
US3061501A
Cited
US2952761A
Cited
US2971073A
Cited
FR1230097A
Cited
US2979773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |