US2822579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making glass filaments
Assignee: Individual
•
Filing: 1953-03-30
•
Granted: 1958-02-11
•
Expires: 1973-03-30
Abstract
No abstract record available.
Inventors
- 👤 Silverman Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:51
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/06; C03B37/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A METHOD OF FORMING GLASS FILAMENTS WHICH COMPRISES FORMING A MIXTURE OF PARTICLES OF GLASS-FORMING MATERIALS, EXTRUDING THE RESULTANT MIXTURE INTO A COHERENT SHAPE, HEATING SAID SHAPE TO A TEMPERATURE SUFFICIENT TO CURE AND HARDEN SAID SHAPE, BFREAKING HARDENED SHAPE INTO FRAGMENTS OF A SIZE GREATER THAN THE PARTICLE SIZE OF
Claim 2
Independent Claim
51 words
A METHOD OF FORMING GLASS FILAMENTS WHICH COMPRISES FORMING A MIXTURE OF PARTICLES OF GLASS-FORMING MATERIALS, EXTRUDING THE RESULTANT MIXTURE INTO A COHERENT SHAPE, HEATING SAID SHAPE TO A TEMPERATURE SUFFICIENT TO CURE AND HARDEN SAID SHAPE, BFREAKING HARDENED SHAPE INTO FRAGMENTS OF A SIZE GREATER THAN THE PARTICLE SIZE OF
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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) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |