US2925317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shrinkproofing of protein fibers with polyalkyleneimines
Assignee: Individual
•
Filing: 1956-09-18
•
Granted: 1960-02-16
•
Expires: 1976-09-18
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Moore
- 👤 Jr Clay E Pardo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:41
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A PROCESS FOR SHRINKPROOFING PROTEIN FIBERS WHICH COMPRISES IMPREGNATING THE PROTEIN FIBERS WITH AN AQUEOUS ALKALINE SOLUTION, HAVING A PH ABOUT FROM 9 TO 11, CONTAINING A PREFORMED POLYETHYLENE IMINE HAVING A MOLECULAR WEIGHT OF ABOUT FROM 20,000 TO 30,000, AND CURING THE IMPREGNATED PROTEIN FIBER AT A TEMPERATURE FROM ABOUT 75*C. TO ABOUT 150*C.
Claim 2
Dependent Claim
55 words
A PROCESS FOR SHRINKPROOFING PROTEIN FIBERS WHICH COMPRISES IMPREGNATING THE PROTEIN FIBERS WITH AN AQUEOUS ALKALINE SOLUTION, HAVING A PH ABOUT FROM 9 TO 11, CONTAINING A PREFORMED POLYETHYLENE IMINE HAVING A MOLECULAR WEIGHT OF ABOUT FROM 20,000 TO 30,000, AND CURING THE IMPREGNATED PROTEIN FIBER AT A TEMPERATURE FROM ABOUT 75*C. TO ABOUT 150*C.
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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) | 1963-02-15 | 1963-08-17 | 1964-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-15 | 1967-08-17 | 1968-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-15 | 1971-08-17 | 1972-02-16 | $7700.00 | Window Closed / Lapsed |