US3295843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for uniformly heating sheet material
Assignee: Permaglass Inc
•
Filing: 1964-02-17
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Granted: 1967-01-03
•
Expires: 1984-02-17
Abstract
No abstract record available.
Inventors
- 👤 Harold A Mcmaster
- 👤 Norman C Nitschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:48
CPC Classifications
C; C03; C03B; C03B29/00; C03B29/02; C03B29/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD OF HEATING A FLAT SHEET OF MATERIAL AND RAISING ITS TEMPERATURE SUBSTANTIALLY UNIFORMLY, COMPRISING THE STEPS OF POSITIONING THE SHEET SO THAT IT IS SUBSTANTIALLY COMPLETELY SURROUNDED BY A HEAT RADIATING SURFACE INITIALLY AT A UNIFORM ELEVATED TEMPERATURE, THEREBY CAUSING THE NET RATE OF HEAT RADIATION PER UNIT AREA OF THE SURFACE TO BECOME NON-UNIFORM OVER THE SURFACE AND THE TEMPERATURE OF THE SURFACE TO FALL AT A NON-UNIFORM RATE
Claim 2
Independent Claim
72 words
A METHOD OF HEATING A FLAT SHEET OF MATERIAL AND RAISING ITS TEMPERATURE SUBSTANTIALLY UNIFORMLY, COMPRISING THE STEPS OF POSITIONING THE SHEET SO THAT IT IS SUBSTANTIALLY COMPLETELY SURROUNDED BY A HEAT RADIATING SURFACE INITIALLY AT A UNIFORM ELEVATED TEMPERATURE, THEREBY CAUSING THE NET RATE OF HEAT RADIATION PER UNIT AREA OF THE SURFACE TO BECOME NON-UNIFORM OVER THE SURFACE AND THE TEMPERATURE OF THE SURFACE TO FALL AT A NON-UNIFORM RATE
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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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |