US2576980A
Expired / Lapsed
US
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Textile fiber drafting element and method of making same
Assignee: Dayton Rubber Co
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Filing: 1949-10-22
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Granted: 1951-12-04
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Expires: 1969-10-22
Abstract
No abstract record available.
Inventors
- 👤 Robert C Treue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:58
CPC Classifications
D; D01; D01H; D01H5/00; D01H5/18; D01H5/70; D01H5/74; D01H5/80; D01H5/86; D01H2700/00; D01H2700/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A LAP-RESISTANT TEXTILE FIBER DRAFTING ELEMENT HAVING A FIBER WORKING SURFACE COMPRISING A SYNTHETIC RUBBER-LIKE POLYMERIZATION PRODUCT OF AN ALIPHATIC CONJUGATED DIENE HYDROCARBON AND HAVING THE SURFACE THEREOF MODIFIED BY THE REACTION WITH AN AQUEOUS SOLUTION OF SULFURIC ACID CONTAINING THE DICHROMATE ION, THE SULFURIC ACID CONCENTRATION BEING AT LEAST ABOUT ONE PERCENT BUT INSUFFICIENT TO EFFECT SUBSTANTIAL DETERIORATION OF THE RUBBER-LIKE MATERIAL, AND ITS DICHROMATE ION CONCENTRATION BEING AT LEAST ABOUT 0.01 MOL PER LITER.
Claim 2
Dependent Claim
76 words
A LAP-RESISTANT TEXTILE FIBER DRAFTING ELEMENT HAVING A FIBER WORKING SURFACE COMPRISING A SYNTHETIC RUBBER-LIKE POLYMERIZATION PRODUCT OF AN ALIPHATIC CONJUGATED DIENE HYDROCARBON AND HAVING THE SURFACE THEREOF MODIFIED BY THE REACTION WITH AN AQUEOUS SOLUTION OF SULFURIC ACID CONTAINING THE DICHROMATE ION, THE SULFURIC ACID CONCENTRATION BEING AT LEAST ABOUT ONE PERCENT BUT INSUFFICIENT TO EFFECT SUBSTANTIAL DETERIORATION OF THE RUBBER-LIKE MATERIAL, AND ITS DICHROMATE ION CONCENTRATION BEING AT LEAST ABOUT 0.01 MOL PER LITER.
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) | 1954-12-03 | 1955-06-04 | 1955-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-03 | 1959-06-04 | 1959-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-03 | 1963-06-04 | 1963-12-04 | $7700.00 | Window Closed / Lapsed |