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US2838422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for rendering fibrous materials water-repelling
Assignee: Hoechst AG
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Filing: 1954-05-11
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Granted: 1958-06-10
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Expires: 1974-05-11
Abstract
No abstract record available.
Inventors
- 👤 Orthner Ludwig
- 👤 Reuter Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:26
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/184; D06M13/188
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
THE PROCESS OF IMPARTING HYDROPHOBIC PROPERTIES TO FIBROUS MATERIAL WHICH COMPRISES TREATING THE MATERIAL WITH A SOLUTION IN AN INERT ORGANIC SOLVENT OF TRIBASIC MIXED ALUMINIUM SALTS WITH FROM ABOUT 1.5 TO ABOUT 2.8 MOLS OF ORGANIC ACIDS HAVING A BOILING BELOW ABOUT 200* UNDER NORMAL PRESSURE OR SUBLIMATING BELOW THE SAID TEMPERATURE AND WITH FROM ABOUT 0.2 TO ABOUT 1.5 MOLS OF ORGANIC COMPOUNDS OF ACID NATURE HAVING A BOILING POINT OF ABOVE 250*C. AND BEING CAPABLE OF FORMING SALTS WITH ALUMINIUM FREE FROM OH GROUPS, AND REMOVING THE SOLVENT FROM THE MATERIAL.
Claim 2
Dependent Claim
94 words
THE PROCESS OF IMPARTING HYDROPHOBIC PROPERTIES TO FIBROUS MATERIAL WHICH COMPRISES TREATING THE MATERIAL WITH A SOLUTION IN AN INERT ORGANIC SOLVENT OF TRIBASIC MIXED ALUMINIUM SALTS WITH FROM ABOUT 1.5 TO ABOUT 2.8 MOLS OF ORGANIC ACIDS HAVING A BOILING BELOW ABOUT 200* UNDER NORMAL PRESSURE OR SUBLIMATING BELOW THE SAID TEMPERATURE AND WITH FROM ABOUT 0.2 TO ABOUT 1.5 MOLS OF ORGANIC COMPOUNDS OF ACID NATURE HAVING A BOILING POINT OF ABOVE 250*C. AND BEING CAPABLE OF FORMING SALTS WITH ALUMINIUM FREE FROM OH GROUPS, AND REMOVING THE SOLVENT FROM THE MATERIAL.
References Cited (Backward Citations)
GB401712A
Cited
US2599553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |