US3248193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for drawing glass
Assignee: PPG Industries Inc
•
Filing: 1960-03-14
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Granted: 1966-04-26
•
Expires: 1980-03-14
Abstract
No abstract record available.
Inventors
- 👤 Frederick R Hohmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:01
CPC Classifications
C; C03; C03B; C03B15/00; C03B15/14; C03B15/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A METHOD OF DRAWING GLASS COMPRISING THE STEPS OF ESTABLISHING A POOL OF MOLTEN GLASS, FLOATING AN ESSENTIALLY IMMISCIBLE LAYER OF LIQUID ON THE SURFACE OF SAID POOL, SAID LIQUID BEING NON-REACTIVE WITH SAID GLASS, INTRODUCING A BAIT INTO SAID POOL OF MOLTEN GLASS, WITHDRAWING SAID BAIT IN CONTACT WITH SAID MOLTEN GLASS FROM SAID POOL TO DRAW GLASS THEREFROM AND DRAWING GLASS FREE FROM A FILM OF SAID LIQUID UPWARDLY THROUGH AND IN DIRECT CONTACT WITH THE LIQUID LAYER.
Claim 2
Independent Claim
80 words
A METHOD OF DRAWING GLASS COMPRISING THE STEPS OF ESTABLISHING A POOL OF MOLTEN GLASS, FLOATING AN ESSENTIALLY IMMISCIBLE LAYER OF LIQUID ON THE SURFACE OF SAID POOL, SAID LIQUID BEING NON-REACTIVE WITH SAID GLASS, INTRODUCING A BAIT INTO SAID POOL OF MOLTEN GLASS, WITHDRAWING SAID BAIT IN CONTACT WITH SAID MOLTEN GLASS FROM SAID POOL TO DRAW GLASS THEREFROM AND DRAWING GLASS FREE FROM A FILM OF SAID LIQUID UPWARDLY THROUGH AND IN DIRECT CONTACT WITH THE LIQUID LAYER.
References Cited (Backward Citations)
US1422036A
Cited
US2233622A
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US2363695A
Cited
US2754172A
Cited
US2741877A
Cited
US2754559A
Cited
GB797102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |