Patent US3284181A successfully refreshed from Google Patents.
US3284181A
Expired / Lapsed
US
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Process for finishing float glass
Assignee: PPG Industries Inc
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Filing: 1964-07-29
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Granted: 1966-11-08
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Expires: 1984-07-29
Abstract
No abstract record available.
Inventors
- 👤 William C Harrell
- 👤 Jr Henry M Demarest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:22
CPC Classifications
C; C03; C03C; C03C15/00; C03B; C03B18/00; C03B18/02; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y02P40/57
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN THE METHOD OF FORMING A GLASS SHEET BY DEPOSITING MOLTEN GLASS ON A BATH OF MOLTEN TIN OR AN ALLOY OF TIN TO FORM A SHEET OF GLASS SUPPORTED ON THE SURFACE OF SAID BATH, AND REMOVING FROM THE SURFACE OF SAID BATH A SHEET OF GLASS THAT EXHIBITS IRIDESCENCE UON HEATING OR UPON HEATING AND BENDING, THE IMPROVEMENT COMPRISING REMOVING IN THE ABSENCE OF AN ABRASIVE, AT LEAST A PORTION OF THE SURFACE OF THE GLASS THAT WAS IN CONTACT WITH SAID BATH WITHOUT SUBSTANTIALLY CHANGING THE THICKNESS OF THE GLASS.
Claim 2
Dependent Claim
93 words
IN THE METHOD OF FORMING A GLASS SHEET BY DEPOSITING MOLTEN GLASS ON A BATH OF MOLTEN TIN OR AN ALLOY OF TIN TO FORM A SHEET OF GLASS SUPPORTED ON THE SURFACE OF SAID BATH, AND REMOVING FROM THE SURFACE OF SAID BATH A SHEET OF GLASS THAT EXHIBITS IRIDESCENCE UON HEATING OR UPON HEATING AND BENDING, THE IMPROVEMENT COMPRISING REMOVING IN THE ABSENCE OF AN ABRASIVE, AT LEAST A PORTION OF THE SURFACE OF THE GLASS THAT WAS IN CONTACT WITH SAID BATH WITHOUT SUBSTANTIALLY CHANGING THE THICKNESS OF THE GLASS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |