US3293015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for tempering glass sheets on a gas support bed
Assignee: PPG Industries Inc
•
Filing: 1965-10-22
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Granted: 1966-12-20
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 James C Fredley
- 👤 George E Sleighter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:16
CPC Classifications
C; C03; C03B; C03B27/00; C03B27/04; C03B27/0404; C03B27/044; C03B27/048; C03B35/00; C03B35/14; C03B35/16; C03B35/18; C03B35/189; C03B35/22; C03B35/24; C03B35/243; C03B2225/00; C03B2225/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
56 words
APPARATUS FOR HEATING AND TEMPERING GLASS WHICH COMPRISES A PAIR OF ADJACENT GAS SUPPORT BED EACH COMPRISING A PLURALITY OF FLUID OUTLETS WITH ADJACENT EXHAUST AREAS DISPOSED INWARDLY OF THE EDGES OF THE BEDS, MEANS TO SUPPLY HOT GAS TO ONE OF SAID BEDS AND MEANS TO SUPPLY QUENCH GAS TO THE OTHER OF SAID BEDS.
Claim 2
Dependent Claim
56 words
APPARATUS FOR HEATING AND TEMPERING GLASS WHICH COMPRISES A PAIR OF ADJACENT GAS SUPPORT BED EACH COMPRISING A PLURALITY OF FLUID OUTLETS WITH ADJACENT EXHAUST AREAS DISPOSED INWARDLY OF THE EDGES OF THE BEDS, MEANS TO SUPPLY HOT GAS TO ONE OF SAID BEDS AND MEANS TO SUPPLY QUENCH GAS TO THE OTHER OF SAID BEDS.
Claim 3
Independent Claim
50 words
A METHOD OF TEMPERING GLASS IN WHICH A GLASS SHEET AT A TEMPERATURE AT WHICH IT MAY BE TEMPERED IS DISPOSED BETWEEN A LOWER COOLING GAS SUPPORT BED AND AN UPPER COOLING GAS BED, EACH BED SUPPLYING COOLING GAS THROUGH A PLURALITY OF CHANNELS, THE PRESSURE OF GAS FLOWING THROUGH
Claim 4
Independent Claim
50 words
A METHOD OF TEMPERING GLASS IN WHICH A GLASS SHEET AT A TEMPERATURE AT WHICH IT MAY BE TEMPERED IS DISPOSED BETWEEN A LOWER COOLING GAS SUPPORT BED AND AN UPPER COOLING GAS BED, EACH BED SUPPLYING COOLING GAS THROUGH A PLURALITY OF CHANNELS, THE PRESSURE OF GAS FLOWING THROUGH
References Cited (Backward Citations)
US1622817A
Cited
US3223501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |