US3228744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel polypropylene polymers and process for preparing the same
Assignee: Wyeth Holdings LLC
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Filing: 1960-06-21
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Granted: 1966-01-11
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Expires: 1980-06-21
Abstract
No abstract record available.
Inventors
- 👤 William S Karn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:24
CPC Classifications
D; D06; D06M; D06M10/00; D06M10/04; D06M10/06; D06P; D06P1/00; D06P1/44; D06P1/673; D06P1/67333; D06P1/6735; D06P1/67375; D06P3/00; D06P3/79; D06P3/792; D06P5/00; D06P5/20; D06P5/2005; D06P5/22; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
AS A NOVEL FIBER, A CHLOROSULFONATED, SUBSTANTIALLY COLORLESS, PREFORMED POLYPROPYLENE FIBER CAPABLE OF BEING DYED AND POSSESSING GOOD TENSILE STRENGTH, SAID NOVEL FIBER BEING PREPARED BY THE PARTICULATE OR ELECTROMAGNETIC RADIATION OF A PREFORMED POLYPROPYLENE FIBER IN THE PRESENCE OF A MIXTURE OF SULFURIC DIOXIDE AND CHLORINE GASES, WHEREBY SAID FIBER IS CHLOROSULFONATED TO IMPART THERETO A SULFUR CONTENT FROM ABOUT 0.1% TO ABOUT 5% AND A CHLORINE CONTENT FROM ABOUT 0.3% TO ABOUT 20%, ALL ON A WEIGHT BASIS.
Claim 2
Dependent Claim
80 words
AS A NOVEL FIBER, A CHLOROSULFONATED, SUBSTANTIALLY COLORLESS, PREFORMED POLYPROPYLENE FIBER CAPABLE OF BEING DYED AND POSSESSING GOOD TENSILE STRENGTH, SAID NOVEL FIBER BEING PREPARED BY THE PARTICULATE OR ELECTROMAGNETIC RADIATION OF A PREFORMED POLYPROPYLENE FIBER IN THE PRESENCE OF A MIXTURE OF SULFURIC DIOXIDE AND CHLORINE GASES, WHEREBY SAID FIBER IS CHLOROSULFONATED TO IMPART THERETO A SULFUR CONTENT FROM ABOUT 0.1% TO ABOUT 5% AND A CHLORINE CONTENT FROM ABOUT 0.3% TO ABOUT 20%, ALL ON A WEIGHT BASIS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |