US2870277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reconstituted mica heating element
Assignee: Farnam Manuf Co Inc
•
Filing: 1957-03-07
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Granted: 1959-01-20
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Expires: 1977-03-07
Abstract
No abstract record available.
Inventors
- 👤 Larry J Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:20
CPC Classifications
H; H05; H05B; H05B3/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49083; Y10T29/49087; Y10T29/49096
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A METHOD FOR MANUFACTURING AN EMBEDDED ELECTRIC ELEMENT COMPRISING THE STEPS OF SUBSTANTIALLY DRYING SHEETS OF UNCURED RECONSTITUTED MICA, SHAPING THE DRIED SHEETS INTO THE REQUIRED FORM, DISPOSING AN ELECTRICALLY CONDUCTIVE ELEMENT BETWEEN TWO OF SAID SHEETS, AND SUBJECTING THE ASSEMBLY TO A TEMPERATURE OF AT LEAST 250* C., WHILE APPLYING A PRESSURE OF AT LEAST 100 P. S. I. FOR AT LEAST TEN MINUTES TO CURE AND BOND THE SHEETS AND THEREBY SEAL SAID CONDUCTIVE ELEMENT IN AIRTIGHT ENGAGEMENT THEREWITH.
Claim 2
Independent Claim
81 words
A METHOD FOR MANUFACTURING AN EMBEDDED ELECTRIC ELEMENT COMPRISING THE STEPS OF SUBSTANTIALLY DRYING SHEETS OF UNCURED RECONSTITUTED MICA, SHAPING THE DRIED SHEETS INTO THE REQUIRED FORM, DISPOSING AN ELECTRICALLY CONDUCTIVE ELEMENT BETWEEN TWO OF SAID SHEETS, AND SUBJECTING THE ASSEMBLY TO A TEMPERATURE OF AT LEAST 250* C., WHILE APPLYING A PRESSURE OF AT LEAST 100 P. S. I. FOR AT LEAST TEN MINUTES TO CURE AND BOND THE SHEETS AND THEREBY SEAL SAID CONDUCTIVE ELEMENT IN AIRTIGHT ENGAGEMENT THEREWITH.
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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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |