Patent US3558392A successfully refreshed from Google Patents.
US3558392A
Expired / Lapsed
US
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Process for the continuous manufacture of porous writing tips
Assignee: Gillette Co LLC
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Filing: 1966-06-27
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Granted: 1971-01-26
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Expires: 1986-06-27
Abstract
Abstract A METHOD OF MAKING ELONGATED, ROD-LIKE OBJECTS ADAPTED FOR USE AS POINTS FOR WRITING INSTRUMENTS. STEPS INCLUDE POSITIONING A BUNDLE OF PARALLEL STRANDS OF SYNTHETIC FIBERS IN DESIRED RELATION BY DRAWING THE BUNDLE THROUGH A HEAT SETTING ZONE TO ESTABLISH DIMENSIONS AND CROSS-SECTION OF FINAL OBJECT AND ESTABLISH LONGITUDINALLY EXTENDING CHANNELS, AND SUBSEQUENTLY INCREASING THE STRENGTH OF THE OBJECTS BY IMMERSION IN A DILUTE RESIN SOLUTION AND HEATING TO EVAPORATE SOLVENT AND TO CURE THE RESIN. D R A W I N G
Inventors
- 👤 Elden Lucerne Goodenow
- 👤 Daniel W Seregely
- 👤 James O'sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:56
CPC Classifications
B; B43; B43K; B43K1/00; B43K1/12; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249942; Y10T428/249947; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |