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Patent US2815559A successfully refreshed from Google Patents.
US2815559A
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Cellular synthetic fibre thread and a method of making the same
Assignee: Robinson Thread Co Inc
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Filing: 1953-08-03
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Granted: 1957-12-10
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Expires: 1973-08-03
Abstract
No abstract record available.
Inventors
- 👤 Rowland N Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:21
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/0206; D02G1/0253; Y; Y10; Y10S; Y10S57/00; Y10S57/903; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2935; Y10T428/2973; Y10T428/2975; Y10T428/31504; Y10T428/31855; Y10T428/3188
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
76 words
THE METHOD OF MAKING A FLEXIBLE SYNTHETIC FIBRE THREAD COMPRISING THE STEPS OF HEAT SOFTENING AND CRINKLING THE FIBRES OF A MULTIPLE FILAMENT SYNTHETIC THERMOPLASTIC POLYMERIC THREAD, HARDENING THE CRINKLED FIBRES AND FORMING AN EXPANDED CELLULAR STRUCTURE OF A DEFINITE ELONGATION CEMENTING TOGETHER ADJACENT PORTIONS OF THE THREAD FIBERS AND FORMING A FLEXIBLE IMMOBILIZED CELLULAR STRUCTURE HAVING AT LEAST 10% BY VOLUME OF AIR FILLED CELL SPACE APPLYING A COATING TO THE EXTERIOR FIBRES AND THREAD
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) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |