Patent US3386574A successfully refreshed from Google Patents.
Patent US3148968A successfully refreshed from Google Patents.
US3148968A
Expired / Lapsed
US
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Bending glass sheets
Assignee: PPG Industries Inc
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Filing: 1962-03-08
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Granted: 1964-09-15
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Expires: 1982-03-08
Abstract
No abstract record available.
Inventors
- 👤 James H Cypher
- 👤 Clement E Valchar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:02
CPC Classifications
C; C03; C03B; C03B40/00; C03B40/005; C03B23/00; C03B23/02; C03B23/023; D; D04; D04B; D04B1/00; D04B1/14; D04B1/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN THE ART OF BENDING HEAT-SOFTENED GLASS SHEETS WHEREIN A HEAT-SOFTENED GLASS SHEET IS SHAPED BY PRESSURIZED CONTACT BETWEEN A PAIR OF SHAPING MEMBERS HAVING SUBSTANTIALLY COMPLEMENTARY SHAPING SURFACES OPPOSING ONE ANOTHER, THE IMPROVEMENT COMPRISING INTERPOSING KNIT FIBERGLASS FABRIC BETWEEN EACH SHAPING SURFACE AND EACH MAJOR SURFACE OF THE HEAT-SOFTENED GLASS SHEET IN SUCH A MANNER THAT THE FABRIC RETAINS ELASTICITY WHILE APPLYING PRESSURE TO THE HEAT-SOFTENED GLASS SHEET.
Claim 2
Dependent Claim
69 words
IN THE ART OF BENDING HEAT-SOFTENED GLASS SHEETS WHEREIN A HEAT-SOFTENED GLASS SHEET IS SHAPED BY PRESSURIZED CONTACT BETWEEN A PAIR OF SHAPING MEMBERS HAVING SUBSTANTIALLY COMPLEMENTARY SHAPING SURFACES OPPOSING ONE ANOTHER, THE IMPROVEMENT COMPRISING INTERPOSING KNIT FIBERGLASS FABRIC BETWEEN EACH SHAPING SURFACE AND EACH MAJOR SURFACE OF THE HEAT-SOFTENED GLASS SHEET IN SUCH A MANNER THAT THE FABRIC RETAINS ELASTICITY WHILE APPLYING PRESSURE TO THE HEAT-SOFTENED GLASS SHEET.
References Cited (Backward Citations)
US2560599A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |