US4065281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of amber glass
Assignee: Research Cottrell Inc
•
Filing: 1976-05-05
•
Granted: 1977-12-27
•
Expires: 1996-05-05
Abstract
Abstract Amber glass is made by melting a soda-lime glass-forming batch in which at least 1 percent of the silica content is provided by lignite fly ash.
Inventors
- 👤 Robert Edward Byrne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:42
CPC Classifications
C; C03; C03C; C03C1/00; C03C1/002; C03C1/10; Y; Y10; Y10S; Y10S106/00; Y10S106/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A method of producing amber soda-lime glass by a fusion process of Sand: 22.8 Soda Ash: 8.0 Potassium Carbonate: 2.3 Sodium Nitrate: 2.1 Lime: 3.0 Feldspar: 1.6 Borax: 0.5 Antimony: 0.1 plus iron oxide Fe 2 O 3 to the desired color, the improvement comprising substituting at least one percent of the silica content of the sand, lime and feldspar of the batch with lignite fly ash.
Claim 2
Independent Claim
67 words
A method of producing amber soda-lime glass by a fusion process of Sand: 22.8 Soda Ash: 8.0 Potassium Carbonate: 2.3 Sodium Nitrate: 2.1 Lime: 3.0 Feldspar: 1.6 Borax: 0.5 Antimony: 0.1 plus iron oxide Fe 2 O 3 to the desired color, the improvement comprising substituting at least one percent of the silica content of the sand, lime and feldspar of the batch with lignite fly ash.
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US3969122A
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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) | 1980-12-26 | 1981-06-27 | 1981-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-26 | 1985-06-27 | 1985-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-26 | 1989-06-27 | 1989-12-27 | $7700.00 | Window Closed / Lapsed |