Patent US2747006A successfully refreshed from Google Patents.
US2747006A
Expired / Lapsed
US
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Method and apparatus for high frequency preparation of molten glass
Assignee: L O F GLASS FIBERS Co
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Filing: 1953-06-23
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Granted: 1956-05-22
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Expires: 1973-06-23
Abstract
No abstract record available.
Inventors
- 👤 Randolph H Barnard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:09
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/08; C03B37/09; C03B5/00; C03B5/02; C03B5/021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A PROCESS FOR THE PREPARATION OF MOLTEN GLASS OF UNIFORM TEMPERATURE SUITABLE FOR DRAWING INTO FILAMENTARY FORM COMPRISING INDUCTIVELY HEATING A BODY OF MOLTEN GLASS AT A PLURALITY OF FREQUENCIES AND UNDER CONDITIONS OF TEMPERATURE PRODUCTIVE OF ELECTRICAL CONDUCTIVITY IN THE BODY OF GLASS.
Claim 2
Dependent Claim
44 words
A PROCESS FOR THE PREPARATION OF MOLTEN GLASS OF UNIFORM TEMPERATURE SUITABLE FOR DRAWING INTO FILAMENTARY FORM COMPRISING INDUCTIVELY HEATING A BODY OF MOLTEN GLASS AT A PLURALITY OF FREQUENCIES AND UNDER CONDITIONS OF TEMPERATURE PRODUCTIVE OF ELECTRICAL CONDUCTIVITY IN THE BODY OF GLASS.
References Cited (Backward Citations)
US1853843A
Cited
US2101675A
Cited
US2181030A
Cited
US2186718A
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US2229489A
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US2335135A
Cited
US2294266A
Cited
GB608041A
Cited
US2482299A
Cited
US2485851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |