US3682685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating glass fibers
Assignee: Penick & Ford Ltd
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Filing: 1970-03-30
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Granted: 1972-08-08
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Expires: 1990-03-30
Abstract
Abstract A PROCESS FOR PREPARING HEAT CLEANED GLASS FIBERS WHEREIN THE FIBERS ARE FIRST SIZED WITH A STARCH-BASED SIZE INCLUDING AN INSOLUBILIZING AGENT CAPABLE OF TRANSFORMING ANY INORGANIC CONSTITUENTS OF SAID SIZE INTO WATER-INSOULBLE COMPOUNDS UPON PYROLYSIS IN AN OXIDIZING ATMOSPHERE, AND PYROLYZING THE SIZE COMPOSITION IN AN OXIDIZING ATMOSPHERE. THE RESULTING ASH RESIDUE IS CHARACTERIZED BY LOW ELECTICAL CONDUCTIVITY.
Inventors
- 👤 Charles E Rix
- 👤 Karol J Mysels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:22
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; C03C25/32; C03C25/321
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |