Patent US2928754A successfully refreshed from Google Patents.
US2928754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of soil-resistant material
Assignee: Akzo Nobel UK PLC
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Filing: 1956-12-31
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Granted: 1960-03-15
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Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Schappel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:51
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/77; D06M11/79
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A METHOD OF IMPROVING THE SOILL RESISTANCE OF RE GENERATED CELLULOSE FIBERS COMPRISING TREATING SAID FIBERS WITH A COLLOIDAL SILICA SOLUTION CONTAINING AT LEAST ONE BASIC ALUMINUM SALT SELECTED FROM THE GROUP CONSISTING OF BASIC ALUMINUM FORMATE AND BASIC ALUMINUM CHLORIDE AND SUFFICIENT BARIUM IONS TO RECT WITH ALL OF THE SOLUBLE SULFATE PRESENT IN SAID SOLUTION PLUS AN EXCESS OF UP TO 50 PARTS PER MILLION.
Claim 2
Independent Claim
67 words
A METHOD OF IMPROVING THE SOILL RESISTANCE OF RE GENERATED CELLULOSE FIBERS COMPRISING TREATING SAID FIBERS WITH A COLLOIDAL SILICA SOLUTION CONTAINING AT LEAST ONE BASIC ALUMINUM SALT SELECTED FROM THE GROUP CONSISTING OF BASIC ALUMINUM FORMATE AND BASIC ALUMINUM CHLORIDE AND SUFFICIENT BARIUM IONS TO RECT WITH ALL OF THE SOLUBLE SULFATE PRESENT IN SAID SOLUTION PLUS AN EXCESS OF UP TO 50 PARTS PER MILLION.
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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) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |