Patent US2621444A successfully refreshed from Google Patents.
US2621444A
Expired / Lapsed
US
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Process and apparatus for the continuous production of a sliver or roving from fibers of glass, plastic, or like substances
Assignee: Individual
•
Filing: 1949-04-19
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Granted: 1952-12-16
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Expires: 1969-04-19
Abstract
No abstract record available.
Inventors
- 👤 Schuller Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:22
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/02; D02G3/16; D02G3/18; C; C03; C03B; C03B37/00; C03B37/01; C03B37/02; C03B37/03; D01; D01G; D01G99/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1923183A
Cited
US2048651A
Cited
US2132702A
Cited
US2398808A
Cited
US2460899A
Cited
US2450915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |