US3377181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing webs including polypropylene fibers
Assignee: Sanyo Chemical Industries Ltd
•
Filing: 1963-11-19
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Granted: 1968-04-09
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Expires: 1983-11-19
Abstract
No abstract record available.
Inventors
- 👤 Tsutomu Kamijo
- 👤 Takehiko Fujimoto
- 👤 Toshio Saiuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:40
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/292
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A PROCESS FOR MANUFACTURING WEB COMPRISING POLYPROPYLENE STAPLE FIBERS COMPRISING: (A) TREATING POLYPROPYLENE STAPLE FIBERS WITH AN AQUEOUS LIQUID VEHICLE CONTAINING AT LEAST 0.01% BY WEIGHT OF AN ORGANIC PHOSPHATE HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
34 words
A PROCESS FOR MANUFACTURING WEB COMPRISING POLYPROPYLENE STAPLE FIBERS COMPRISING: (A) TREATING POLYPROPYLENE STAPLE FIBERS WITH AN AQUEOUS LIQUID VEHICLE CONTAINING AT LEAST 0.01% BY WEIGHT OF AN ORGANIC PHOSPHATE HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2221262A
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US2341623A
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US2413428A
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US2876141A
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US3044962A
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US3224889A
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US3130249A
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US3145073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |