US3332762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for heat treating glass sheets on a gas support bed
Assignee: Permaglass Inc
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Filing: 1966-09-15
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Granted: 1967-07-25
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Expires: 1986-09-15
Abstract
No abstract record available.
Inventors
- 👤 Harold A Mcmaster
- 👤 Norman C Nitschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:36
CPC Classifications
C; C03; C03B; C03B35/00; C03B35/14; C03B35/22; C03B35/24; C03B23/00; C03B23/02; C03B23/023; C03B23/035; C03B29/00; C03B29/04; C03B29/06; C03B29/08; C03B29/12; C03B35/243; C03B2225/00; C03B2225/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
APPARATUS FOR HEATING SHEETS OF GLASS COMPRISING AN ELONGATED BED HAVING A SURFACE WITH A FIRST LONGITUDINALLY EXTENDING PORTION WITH OPENINGS THEREIN AT LEAST A MAJORITY OF WHICH ARE GAS INLET OPENINGS AND A SECOND LONGITUDINALLY EXTENDING PORTION WITH GAS INLET OPENINGS THEREIN AND WITH A GREATER NUMBER OF GAS OUTLET OPENINGS THAN IN SAID FIRST PORTION, AND MEANS FOR MOVING INDIVIDUALLY SPACED SHEETS OF GLASS OVER SAID FIRST BED PORTION AND THEN OVER SAID SECOND BED PORTION.
Claim 2
Dependent Claim
104 words
IN A METHOD FOR TREATING A GLASS SHEET WHILE SUPPORTING THE SHEET ON GAS ABOVE A BED SURFACE AND TRANSFERRING HEAT BETWEEN SAID GAS AND THE GLASS SHEET, THE IMPROVEMENT COMPRISING; SUPPLYING SAID GAS SO THAT THE GAS PROVIDES A FORCE SUFFICIENT TO SUPPORT AND MAINTAIN THE GLASS SHEET AT A RELATIVELY LARGE SPACING FROM SAID BED SURFACE DURING A PERIOD OF RELATIVELY HIGH RATE OF HEAT TRANSFER, AND SUPPLYING SAID GAS SO THAT THE GAS PROVIDES A FORCE SUFFICIENT TO SUPPORT AND MAINTAIN THE GLASS SHEET AT A LESSER SPACING FROM SAID BED SURFACE DURING A PERIOD OF LESSER RATE OF HEAT TRANSFER.
References Cited (Backward Citations)
US3223501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |