US2900264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of changing glass composition
Assignee: Libbey Owens Ford Glass Co
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Filing: 1955-04-20
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Granted: 1959-08-18
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Expires: 1975-04-20
Abstract
No abstract record available.
Inventors
- 👤 Wilbur F Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:55
CPC Classifications
C; C03; C03C; C03C1/00; C03C1/10; C03B; C03B5/00; C03B5/16; C03B5/173
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
IN THE MANUFACTURE OF GLASS, A METHOD OF CHANGING FROM THE PRODUCTION OF REGULAR GLASS TO THE PRODUCTION OF GLARE-RESISTANT GLASS CONTAINING APPRECIABLY LARGER AMOUNTS OF IRON OXIDE IN A CONTINOUSLY OPERATING TANK FURNACE DURING THE CONTINOUS OPERATION THEREOF COMPRISING, ADDING TO THE REGULAR GLASS IN SAID CONTINUOUSLY OPERATING FURNACE GLARE-RESISTANT GLASS IN SAID CONTINOUSLY ALONG WITH SUBSTANTIALLY 43% TO 75% OF THE CALCULATED DEFICIENCY OF IRON OXIDE EXISTING IN SAID TANK FURNACE THE START OF THE CHANGE-OVER PERIOD AS COMPARED TO THE DESIRED IRON OXIDE CONTENT REQUIRED IN TANK FURNACE FOR THE PRODUCTION OF GLARE-RESISTANT GLASS, SAID IRON OXIDE DEFICIENCY BEING ADDED ALONG WITH THE GLARE-RESISTANT GLASS BATCH MATERIAL OVER A FIXED PERIOD OF TIME, SAID CHANGEOVER PERIOD HAVING A MINIMUM LIMIT FOR A GIVEN PERCENTAGE OF SAID CALCULATED DEFICIENCY BEING ADDED BASED ON A MINIMUM OF ABOUT 15 HOURS WHEN 70% OF SAID CALCULATED DEFICIENCY IS ADDED.
Claim 2
Dependent Claim
149 words
IN THE MANUFACTURE OF GLASS, A METHOD OF CHANGING FROM THE PRODUCTION OF REGULAR GLASS TO THE PRODUCTION OF GLARE-RESISTANT GLASS CONTAINING APPRECIABLY LARGER AMOUNTS OF IRON OXIDE IN A CONTINOUSLY OPERATING TANK FURNACE DURING THE CONTINOUS OPERATION THEREOF COMPRISING, ADDING TO THE REGULAR GLASS IN SAID CONTINUOUSLY OPERATING FURNACE GLARE-RESISTANT GLASS IN SAID CONTINOUSLY ALONG WITH SUBSTANTIALLY 43% TO 75% OF THE CALCULATED DEFICIENCY OF IRON OXIDE EXISTING IN SAID TANK FURNACE THE START OF THE CHANGE-OVER PERIOD AS COMPARED TO THE DESIRED IRON OXIDE CONTENT REQUIRED IN TANK FURNACE FOR THE PRODUCTION OF GLARE-RESISTANT GLASS, SAID IRON OXIDE DEFICIENCY BEING ADDED ALONG WITH THE GLARE-RESISTANT GLASS BATCH MATERIAL OVER A FIXED PERIOD OF TIME, SAID CHANGEOVER PERIOD HAVING A MINIMUM LIMIT FOR A GIVEN PERCENTAGE OF SAID CALCULATED DEFICIENCY BEING ADDED BASED ON A MINIMUM OF ABOUT 15 HOURS WHEN 70% OF SAID CALCULATED DEFICIENCY IS ADDED.
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) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |