US3241937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for manufacture of float glass
Assignee: PPG Industries Inc
•
Filing: 1962-05-02
•
Granted: 1966-03-22
•
Expires: 1982-05-02
Abstract
No abstract record available.
Inventors
- 👤 Edmund R Michalik
- 👤 George W Misson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:55
CPC Classifications
C; C03; C03B; C03B18/00; C03B18/02; C03B18/04; C03B18/08; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C3/085; C03C3/087; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y02P40/57
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A METHOD OF TREATING GLASS WHICH COMPRISES: FLOATING A MASS OF GLASS ON A LIQUID HAVING A DENSITY GREATER THAN THAT OF THE GLASS, SAID MASS HAVING MARGINS AND AN UPPER SURFACE, MAINTAINING A PORTION OF SAID FLOATING GLASS AT ITS MELTING TEMPERATURE, PROJECTING GAS AGAINST THE MARGINS OF SAID FLOATING GLASS TO FOR A GAS CURTAIN, AND ESTABLISHING A FLUID PRESSURE ON THE UPPER SURFACE OF THE FLOATING GLASS INCLUDING A PART OF WHICH IS AT ITS MELTING TEMPERATURE INWARD OF THE MARGINS THEREOF AND THE GAS CURTAIN, WHICH PRESSURE IS DIFFERENT FROM THE PRESSURE ON THE LIQUID CONTACTING THE GLASS OUTSIDE THE CURTAIN.
Claim 2
Dependent Claim
118 words
APPARATUS FOR TREATING GLASS WHICH COMPRISES: A BATH OF A LIQUID HAVING A DENSITY GREATER THAN GLASS, MEANS FOR DELIVERING A MASS OF GLASS ONTO SAID LIQUID TO BE SUPPORTED THEREBY, SAID MASS OF GLASS HAVING MARGINS AND AN UPPER SURFACE, MEANS FOR MAINTAINING A PORTION OF SAID SUPPORTED GLASS AT ITS MELTING TEMPERATURE, MEANS FOR PROJECTING A GAS CURTAIN AGAINST THE MARGINS OF SAID SUPPORTED GLASS, AND MEANS FOR ESTABLISHING A FLUID PRESSURE ON THE UPPER SURFACE OF THE FLOATING GLASS INCLUDING A PART OF WHICH IS AT ITS MELTING TEMPERATURE AND INWAARD OF THE MARGINS THEREOF AND THE GAS CURTAIN, WHICH PRESSURE IS DIFFERENT FROM THE PRESSURE ON THE LIQUID CONTACTING THE GLASS OUTSIDE THE CURTAIN.
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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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |