Patent US3161537A successfully refreshed from Google Patents.
US3161537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for increasing the scratch resistance of glass
Assignee: EIDP Inc
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Filing: 1961-12-22
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Granted: 1964-12-15
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Expires: 1981-12-22
Abstract
No abstract record available.
Inventors
- 👤 Dettre Robert Harold
- 👤 Nelson Jerry Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:41
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A PROCESS FOR INCREASING THE SCRATCH RESISTANCE OF GLASS BY APPLYING AN ORGANO-TITANIUM COMPOUND TO THE SURFACE OF THE GLASS, WHICH IS IN NON-FIBROUS FORM, HEATING THE GLASS, AND THEN ALLOWING THE GLASS TO STAND IN AIR FOR A PERIOD OF NOT LESS THAN 20 MINUTES TO DEVELOP THE DESIRED SCRATCH RESISTANCE, THE IMPROVEMENT WHICH COMPRISES ELIMINATING THE STANDING PERIOD REQUIRED TO DEVELOP SCRATCH RESISTANCE BY COATING THE SURFACE OF THE GLASS, IMMEDIATELY AFTER THE HEATING STEP AND AT A TEMPERATURE BETWEEN ROOM TEMPERATURE AND 150*C., WITH A NITROGENOUS COMPOUND SELECTED FROM THE GROUP CONSISITNG OF ALIPHATIC AND CYCLOALIPHATIC AMINES, THEIR SALTS AND QUATERNARY DERIVATIVES, SAID AMINES BEING COMPOUNDS OF THE FORMULAS
Claim 2
Dependent Claim
113 words
IN A PROCESS FOR INCREASING THE SCRATCH RESISTANCE OF GLASS BY APPLYING AN ORGANO-TITANIUM COMPOUND TO THE SURFACE OF THE GLASS, WHICH IS IN NON-FIBROUS FORM, HEATING THE GLASS, AND THEN ALLOWING THE GLASS TO STAND IN AIR FOR A PERIOD OF NOT LESS THAN 20 MINUTES TO DEVELOP THE DESIRED SCRATCH RESISTANCE, THE IMPROVEMENT WHICH COMPRISES ELIMINATING THE STANDING PERIOD REQUIRED TO DEVELOP SCRATCH RESISTANCE BY COATING THE SURFACE OF THE GLASS, IMMEDIATELY AFTER THE HEATING STEP AND AT A TEMPERATURE BETWEEN ROOM TEMPERATURE AND 150*C., WITH A NITROGENOUS COMPOUND SELECTED FROM THE GROUP CONSISITNG OF ALIPHATIC AND CYCLOALIPHATIC AMINES, THEIR SALTS AND QUATERNARY DERIVATIVES, SAID AMINES BEING COMPOUNDS OF THE FORMULAS
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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) | 1967-12-15 | 1968-06-15 | 1968-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-15 | 1972-06-15 | 1972-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-15 | 1976-06-15 | 1976-12-15 | $7700.00 | Window Closed / Lapsed |