Patent US2922720A successfully refreshed from Google Patents.
US2922720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass composition colored by copper and tin, and method of manufacturing same
Assignee: Jos Schlitz Brewing Co
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Filing: 1957-06-20
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Granted: 1960-01-26
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Expires: 1977-06-20
Abstract
No abstract record available.
Inventors
- 👤 Thomas B Parks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:02
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/02; C03C14/00; C03C14/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A PROCESS FOR DIRECTLY FORMING A RUBY RED GLASS HAVING COLOR DEPENDENT UPON THE PRESENCE OF COPPER, INCLUDING THE STEPS OF ADDING TO A SILICATE-GLASS-MAKING BATCH A COMPLEX COMPRISING A COPPER-TIN-BIURET INCLUDING A COMPONENTS A COPPER COMPOUND, A TIN COMPOUND AND UREA IN AN APPROXIMATE PROPORTION RANGING FROM 4 TO 10 MOLECULES OR UREA FOR EACH ATOMIC WEIGHT OF CUPROUS COPPER, SAID BIURET BEING IN QUANTITIES AND PROPORTIONS SUFFICIENT TO CAUSE THE CONCENTRATION OF COPPER IN THE FINISHED GLASS, IN TERMS OF COPPER OXIDE, TO FALL BETWEEN 0.03% AND 0.25%, AND THE CONCENTRATION OF TIN, IN TERMS OF STANNIC OXIDE, TO FALL BETWEEN 1/4 AND 31/2 TIMES THE CONCENTRATE OF COPPER, AND THEN FUSING AND FINING SAID BATCH IN AN OPEN FURNACE.
Claim 2
Dependent Claim
122 words
A PROCESS FOR DIRECTLY FORMING A RUBY RED GLASS HAVING COLOR DEPENDENT UPON THE PRESENCE OF COPPER, INCLUDING THE STEPS OF ADDING TO A SILICATE-GLASS-MAKING BATCH A COMPLEX COMPRISING A COPPER-TIN-BIURET INCLUDING A COMPONENTS A COPPER COMPOUND, A TIN COMPOUND AND UREA IN AN APPROXIMATE PROPORTION RANGING FROM 4 TO 10 MOLECULES OR UREA FOR EACH ATOMIC WEIGHT OF CUPROUS COPPER, SAID BIURET BEING IN QUANTITIES AND PROPORTIONS SUFFICIENT TO CAUSE THE CONCENTRATION OF COPPER IN THE FINISHED GLASS, IN TERMS OF COPPER OXIDE, TO FALL BETWEEN 0.03% AND 0.25%, AND THE CONCENTRATION OF TIN, IN TERMS OF STANNIC OXIDE, TO FALL BETWEEN 1/4 AND 31/2 TIMES THE CONCENTRATE OF COPPER, AND THEN FUSING AND FINING SAID BATCH IN AN OPEN FURNACE.
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) | 1963-01-25 | 1963-07-27 | 1964-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-25 | 1967-07-27 | 1968-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-25 | 1971-07-27 | 1972-01-26 | $7700.00 | Window Closed / Lapsed |