US2901449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organosilicon condensation products and processes for producing them
Assignee: Siemens Schuckertwerke AG
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Filing: 1954-07-01
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Granted: 1959-08-25
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Expires: 1974-07-01
Abstract
No abstract record available.
Inventors
- 👤 Schwarz Robert
- 👤 Kuchen Wilhelm
- 👤 Weigel Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:15
CPC Classifications
C; C08; C08G; C08G77/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
THE METHOD OF PRODUCING HEAT-HARDENABLE RESINOUS PRODUCTS, COMPRISING HEATING AN ADMIXTURE OF AN AROMATIC SILIXCIC ACID ESTER AND AT LEAST ONE ALIPHATIC POLYHYDROXY COMPOUND, AN ISOCYANATE TAKEN FROM THE GROUP CONSISTING OF ALKYLENE AND ARYLENE POLYISOCYANATES BEING ADDED TO THE SAID ADMIXTURE TO REACT WITH THE SAID POLYHYDROXY COMPOUND, THE POLYISOCYANATE ADDITION BEING IN AN AMOUNT TO LEAVE AT LEAST 0.1 MOLE OF HYDROXYL GROUPS PER MOLE OF AROMATIC SILICATE, THERE BEING A RA TIO OF 0.1 TO ABOUT 0.33 MOLE OF THE AROMATIC SILICIC ACID ESTER PER MOLE OF HYDROXYL GROUPS IN THE POLYHYDROXY COMPOUND AND A MAXIMUM TOTAL MOLE RATIO OF THE SILICATE ACID ESTER AND POLVISOCYANATE OF ABOUT 0.66 PER MOLE OF THE HYDROXYL GROUPS IN SAID POLYHYDROXYL COMPOUND, CONTINUING THE HEATING UNTIL SEPARATION OF THE COMPONENTS UPON COOLING SUBSTANTIALLY CEASES, AND SEPARATING LIBERATED AROMATIC ALCOHOL FROM THE REACTION PRODUCT COMPRISING A SUBSTANTIAL RATIO OF FREE HYDROXYL GROUPS.
Claim 2
Independent Claim
151 words
THE METHOD OF PRODUCING HEAT-HARDENABLE RESINOUS PRODUCTS, COMPRISING HEATING AN ADMIXTURE OF AN AROMATIC SILIXCIC ACID ESTER AND AT LEAST ONE ALIPHATIC POLYHYDROXY COMPOUND, AN ISOCYANATE TAKEN FROM THE GROUP CONSISTING OF ALKYLENE AND ARYLENE POLYISOCYANATES BEING ADDED TO THE SAID ADMIXTURE TO REACT WITH THE SAID POLYHYDROXY COMPOUND, THE POLYISOCYANATE ADDITION BEING IN AN AMOUNT TO LEAVE AT LEAST 0.1 MOLE OF HYDROXYL GROUPS PER MOLE OF AROMATIC SILICATE, THERE BEING A RA TIO OF 0.1 TO ABOUT 0.33 MOLE OF THE AROMATIC SILICIC ACID ESTER PER MOLE OF HYDROXYL GROUPS IN THE POLYHYDROXY COMPOUND AND A MAXIMUM TOTAL MOLE RATIO OF THE SILICATE ACID ESTER AND POLVISOCYANATE OF ABOUT 0.66 PER MOLE OF THE HYDROXYL GROUPS IN SAID POLYHYDROXYL COMPOUND, CONTINUING THE HEATING UNTIL SEPARATION OF THE COMPONENTS UPON COOLING SUBSTANTIALLY CEASES, AND SEPARATING LIBERATED AROMATIC ALCOHOL FROM THE REACTION PRODUCT COMPRISING A SUBSTANTIAL RATIO OF FREE HYDROXYL GROUPS.
References Cited (Backward Citations)
FR923420A
Cited
US2048799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |