US2722718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making fine inherently curly glass filaments
Assignee: Individual
•
Filing: 1950-08-21
•
Granted: 1955-11-08
•
Expires: 1970-08-21
Abstract
No abstract record available.
Inventors
- 👤 Ralph G H Siu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:43
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/02; C03B37/022; C03B37/06; C03C; C03C13/00; Y; Y10; Y10S; Y10S264/00; Y10S264/75
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD OF PREPARING FILAMENTS OF GLASS, CHARACTERIZED BY MIXING MOLTEN GLASS WITH POWDERED SOLID MATERIAL OF SUCH FINENESS THAT THE POWDER PARTICLES ARE INCORPORATED WHOLLY WITHIN SAID FILAMENTS, SAID POWDERED SOLID MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF ASBESTOS, BENTONITE AND SILICA SAND, AND CAUSING SAID MOLTEN GLASS TO FLOW IN A LIQUID STREAM TO THE VERTEX OF A SUBSTANTIALLY CONE-SHAPED, HEATED, ROTATING STREAM OF GAS OR VAPOR TRAVELING WITH A HIGH VELOCITY UNDER SUCH PRESSURE AS WILL BREAK UP THE SAID STREAM OF MOLTEN GLASS INTO FINE INHERENTLY CURLY FILAMENTS.
Claim 2
Independent Claim
93 words
A METHOD OF PREPARING FILAMENTS OF GLASS, CHARACTERIZED BY MIXING MOLTEN GLASS WITH POWDERED SOLID MATERIAL OF SUCH FINENESS THAT THE POWDER PARTICLES ARE INCORPORATED WHOLLY WITHIN SAID FILAMENTS, SAID POWDERED SOLID MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF ASBESTOS, BENTONITE AND SILICA SAND, AND CAUSING SAID MOLTEN GLASS TO FLOW IN A LIQUID STREAM TO THE VERTEX OF A SUBSTANTIALLY CONE-SHAPED, HEATED, ROTATING STREAM OF GAS OR VAPOR TRAVELING WITH A HIGH VELOCITY UNDER SUCH PRESSURE AS WILL BREAK UP THE SAID STREAM OF MOLTEN GLASS INTO FINE INHERENTLY CURLY FILAMENTS.
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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) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |