Method of coating glass surface and products produced thereby
Abstract
Abstract THE LUBRICITY AND SCRATCH RESISTANCE OF A GLASS SURFACE ARE IMPROVED BY APPLYING A PYROLYZABLE TIN OR TITANIUM COMPOUND TO THE HOT GLASS SURFACE TO FORM A SUBSTANTIALLY COLORLESS TIN OR TITANIUM OXIDE LAYER THEREON, AND THEN APPLYING, DIRECTLY UPON THE OXIDE LAYER, AN AQUEOUS SOLUTION OF A WATER-SOLUBLE THERMOSETTING ESTER WHICH IS A REACTION PRODUCT OF (A) A NON-IONIC SURFACTANT THAT CONTAINS AT LEAST ONE ALCOHOLIC HYDROXY GROUP WITH (B) A POLYCARBOXYLIC ACID OR ANHYDRIDE OF THE CLASS CONSISTING OF ALIPHATIC DICARBOXYLIC ACIDS AND ANHYDRIDES HAVING NOT MORE THAN SIX CARBON ATOMS AND BENZENE POLYCARBOXYLIC ACIDS AND ANHYDRIDES HAVING FROM 3 TO 4 CARBOXYL GROUPS, DRYING AND SETTING THE ESTER TO PRODUCE A TRANSPARENT, SUBSTANTIALLY COLORLESS INSOLUBLE COATING LAYER. THE RESULTING DUAL COATING HAS HIGH LUBRICITY, AND AFFORDS SCRATCH RESISTANCE WHICH IS MUCH GREATER THAN THAT WHICH WOULD BE IMPARTED BY EITHER COATING ALONE.
Inventors
- 👤 J Crawford
- 👤 R Russell
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |