Patent US2187158A successfully refreshed from Google Patents.
Patent US3417330A successfully refreshed from Google Patents.
Patent US3065090A successfully refreshed from Google Patents.
US3065090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing glass
Assignee: PPG Industries Inc
•
Filing: 1959-05-11
•
Granted: 1962-11-20
•
Expires: 1979-05-11
Abstract
No abstract record available.
Inventors
- 👤 Robert W Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:07
CPC Classifications
C; C03; C03C; C03C1/00; C03C1/02; C03C1/026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A METHOD OF PREPARING GLASS BY MIXING AND HEATING A MIXTURE OF GLASS MAKING INGREDIENTS COMPRISING SAND AND ALKALI METAL SALTS, WHICH COMPRISES FORMING AN AQUEOUS SOLUTION OF A PORTION OF SAID SALTS, MIXING SAID AQUEOUS SOLUTION OF SAID SALTS WITH SAID SAND AND THE REMAINDER OF SAID ALKALI METAL SALTS, THE AMOUNT OF AQUEOUS SOLUTION PRESENT BEING ENOUGH TO PRODUCE A WET MIXTURE OF THE ALKALI METAL SALTS AND SAND AND THEREBY FORMING AGGLOMERATES, FEEDING THE RESULTING AGGLOMERATES INTO A GLASS FORMING FURNACE AND MELTING SAID AGGLOMERATES.
Claim 2
Independent Claim
88 words
A METHOD OF PREPARING GLASS BY MIXING AND HEATING A MIXTURE OF GLASS MAKING INGREDIENTS COMPRISING SAND AND ALKALI METAL SALTS, WHICH COMPRISES FORMING AN AQUEOUS SOLUTION OF A PORTION OF SAID SALTS, MIXING SAID AQUEOUS SOLUTION OF SAID SALTS WITH SAID SAND AND THE REMAINDER OF SAID ALKALI METAL SALTS, THE AMOUNT OF AQUEOUS SOLUTION PRESENT BEING ENOUGH TO PRODUCE A WET MIXTURE OF THE ALKALI METAL SALTS AND SAND AND THEREBY FORMING AGGLOMERATES, FEEDING THE RESULTING AGGLOMERATES INTO A GLASS FORMING FURNACE AND MELTING SAID AGGLOMERATES.
References Cited (Backward Citations)
US2220750A
Cited
US2255238A
Cited
US2366473A
Cited
GB576335A
Cited
US2461011A
Cited
US2813036A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |