US2977249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for waterproofing fibrous materials
Assignee: Boehme Fettchemie GmbH
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Filing: 1957-06-11
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Granted: 1961-03-28
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Expires: 1977-06-11
Abstract
No abstract record available.
Inventors
- 👤 Heyden Rudi
- 👤 Wedell Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:16
CPC Classifications
C; C14; C14C; C14C9/00; D; D06; D06M; D06M11/00; D06M11/68; D06M11/70; D06M11/71; D06M13/00; D06M13/02; D06M13/244; D06M13/282; D06M13/288; D06M13/292; D06M13/50; D06M13/503; D06M13/51; D06M19/00; D06M23/00; D06M23/10; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
THE PROCESS OF WATERPROOFING FIBROUS MATERIALS, WHICH COMPRISES IMPREGNATING SAID FIBROUS MATERIALS WITH A CONDENSATION PRODUCT FORMED BY A CONDENSATION REACTION BETWEEN (A) ALCOHOLATES OF POLYVALENT METALS SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, MAGNESIUM, TITANIUM AND ZIRCONIUM AND (B) DIACID PHOSPHORIC ACID MONO-ESTERS OF HIGH MOLECULAR-WEIGHT ORGANIC HYDROXYL COMPOUNDS CONTAINING AT LEAST 6 CARBON ATOMS, SAID ALCOHOLATES AND SAID MONOESTERS BEING PRESENT IN A MOLAR RATIO OF FROM 1:0.5 TO 1:1.5, SAID CONDENSATION PRODUCT BEING IN SOLUTION IN AN INERT ORGANIC SOLVENT, AND EVAPORATING THE SOLVENT.
Claim 2
Dependent Claim
87 words
THE PROCESS OF WATERPROOFING FIBROUS MATERIALS, WHICH COMPRISES IMPREGNATING SAID FIBROUS MATERIALS WITH A CONDENSATION PRODUCT FORMED BY A CONDENSATION REACTION BETWEEN (A) ALCOHOLATES OF POLYVALENT METALS SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, MAGNESIUM, TITANIUM AND ZIRCONIUM AND (B) DIACID PHOSPHORIC ACID MONO-ESTERS OF HIGH MOLECULAR-WEIGHT ORGANIC HYDROXYL COMPOUNDS CONTAINING AT LEAST 6 CARBON ATOMS, SAID ALCOHOLATES AND SAID MONOESTERS BEING PRESENT IN A MOLAR RATIO OF FROM 1:0.5 TO 1:1.5, SAID CONDENSATION PRODUCT BEING IN SOLUTION IN AN INERT ORGANIC SOLVENT, AND EVAPORATING THE SOLVENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |