Patent US3223501A successfully refreshed from Google Patents.
US3223501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for treating glass on a pressurized fluid bed
Assignee: PPG Industries Inc
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Filing: 1962-05-18
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Granted: 1965-12-14
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Expires: 1982-05-18
Abstract
No abstract record available.
Inventors
- 👤 James C Fredley
- 👤 George E Sleighter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:18
CPC Classifications
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Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A METHOD OF CONVEYING SHEET MATERIAL AT A DEFORMATION TEMPERATURE WHICH COMPRISES ESTABLISHING A PLURALITY OF SEPARATE SPACED GASEOUS PRESSURE SUPPORT ZONES EACH EXERTING AN UPWARD SUPPORTING PRESSURE, EXHAUSTING GAS AT LOWER PRESSURE FROM SAID ZONES AT POINTS ADJACENT SAID ZONES, DISPOSING SHEET MATERIAL ON A PORTION OF SAID ZONES AND IN CONTACT WITH THE GAS THEREOF, THE GAS SUPPORTING THE SHEET MATERIAL, FEEDING GAS INTO SAID ZONES IN AN INITIAL DIRECTION AWAY FROM THE DIRECTION OF THE SUPORT PRESSURE, AND MOVING THE SHEET MATERIAL ACROSS ANOTHER PORTION OF SAID SUPPORT ZONES. 9 APPARATUS FOR PROVIDING FLUID SUPPORT FOR A MOVING SHEET OF GLASS COMPRISING A PLURALITY OF ROWS OF OPEN TOPPED FLUID OUTLETS EACH OF WHICH SUBTENDS A SMALL PORTION OF THE SUPPORT AND EACH HAVING AT LEAST PORTIONS OF
Claim 2
Independent Claim
131 words
A METHOD OF CONVEYING SHEET MATERIAL AT A DEFORMATION TEMPERATURE WHICH COMPRISES ESTABLISHING A PLURALITY OF SEPARATE SPACED GASEOUS PRESSURE SUPPORT ZONES EACH EXERTING AN UPWARD SUPPORTING PRESSURE, EXHAUSTING GAS AT LOWER PRESSURE FROM SAID ZONES AT POINTS ADJACENT SAID ZONES, DISPOSING SHEET MATERIAL ON A PORTION OF SAID ZONES AND IN CONTACT WITH THE GAS THEREOF, THE GAS SUPPORTING THE SHEET MATERIAL, FEEDING GAS INTO SAID ZONES IN AN INITIAL DIRECTION AWAY FROM THE DIRECTION OF THE SUPORT PRESSURE, AND MOVING THE SHEET MATERIAL ACROSS ANOTHER PORTION OF SAID SUPPORT ZONES. 9 APPARATUS FOR PROVIDING FLUID SUPPORT FOR A MOVING SHEET OF GLASS COMPRISING A PLURALITY OF ROWS OF OPEN TOPPED FLUID OUTLETS EACH OF WHICH SUBTENDS A SMALL PORTION OF THE SUPPORT AND EACH HAVING AT LEAST PORTIONS OF
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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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |