US3578430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed float glass plants
Assignee: Erste Deutsche Floatglas & Co Ohg GmbH
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Filing: 1968-03-27
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Granted: 1971-05-11
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Expires: 1988-03-27
Abstract
Abstract THE SPECIFICATION DESCRIBES MEANS FOR PREVENTING THE ACCESS OF AIR TO MOLTEN GLASS PASSING FROM A CONTAINER OR SOURCE THEREOF TO A CHAMBER HAVING A BATH OF MOLTEN TIN THEREIN, ON WHICH THE MOLTEN GLASS IS FLOATED TO PRODUCE A GLASS SHEET INCLUDING A PLURALITY OF WEIRS, AT LEAST ONE OF WHICH IS OF A GAS-IMPERVIOUS NATURE, AND A MASONRY CHANNEL HAVING GAS-IMPERVIOUS EXTERNAL SHEATHING STRUCTURE.
Inventors
- 👤 Gunter Labrot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:54
CPC Classifications
C; C03; C03B; C03B18/00; C03B18/02; C03B18/04; C03B5/00; C03B5/16; C03B5/26; C03B5/265; C03B5/267
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |