US3317296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making fibrous product
Assignee: PPG Industries Inc
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Filing: 1966-01-13
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Granted: 1967-05-02
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Expires: 1986-01-13
Abstract
No abstract record available.
Inventors
- 👤 Winfield T Irwin
- 👤 Warren W Drummond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:58
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/06; C03B37/065; C03B37/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
134 words
A PROCESS FOR PRODUCING AN EXPANDED, MULTIFILAMENT FIBER GLASS PRODUCT WHICH COMPRISES COLLECTING A PLURALITY OF LONGITUDINALLY EXTENDING SIZED FIBER GLASS STRANDS COMPOSED OF FILAMENTS TO FORM A TOW, CRIMPING THE STRANDS OF SAID TOW, HEATING SAID CRIMPED STRANDS AT A TEMPERATURE SUFFICIENT TO SOFTEN THE FILAMENTS OF SAID STRANDS AND TO REMOVE SIZE PRESENT IN SAID TOW UNTIL SAID FILAMENTS ARE SOFTENED, COOLING SAID SOFTENED FILAMENTS TO IMPART PERMANENT CRIMP IN A PLURALITY OF DIRECTIONS WHEREBY SAID FILAMENTS AND STRANDS ARE INTERWINED AND EACH RELATIVELY MOVABLE WITH RESPECT TO ONE ANOTHER WHEN SAID TOW IS SUBSTANTIALLY FREE OF TENSION, AND THEREAFTER DIRECTING A GASEOUS STREAM AGAINST SAID TOW THUS MOVING SAID STRANDS AND FILAMENTSD WITH RESPECT TO ONE ANOTHER TO FORM A MASS OF INCREASED BULK AND OF LESS DENSITY THAN THE TOW.
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) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |