US2868820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of hexaorganodistannoxane and triorganotin hydroxide
Assignee: Wacker Chemie AG
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Filing: 1955-05-02
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Granted: 1959-01-13
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Expires: 1975-05-02
Abstract
No abstract record available.
Inventors
- 👤 Nitzsche Siegfried
- 👤 Riedle Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:18
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/22; C07F7/2224
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
IN THE METHOD FOR THE PREPARATION OF TRIORGANOTIN HYDROXIDE AND HEXAORGANODISTANNOXANE BY THE SAPONIFICATION OF AN ORGANOTIN HALIDE MIXTURE COMPRISING TETRAORGANOTIN AND TRIORGANOTIN HALIDE, THE ORGANIC RADICALS ATTACHED TO TIN BEING SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS OF FROM 1 TO 12 INCLUSIVE CARBON ATOMS AND ARYL RADICALS OF FROM 6 TO 10 INCLUSIVE CARBON ATOMS, THE IMPROVEMENT WHICH COMPRISES (1) SEPARATING THE INSOLUBLE PRECIPITATE FROM THE SAPONIFICATION PRODUCT, (2) SEPARATING A FRACTION CONTAINING ANY UNSAPONIFIED TRIORGANOTIN HALIDE AND TETRAORGANOTIN FROM THE LIQUID PORTION OF THE SAPONIFICATION PRODUCT, (3) CONTACTING THE AFORESAID INSOLUBLE PRECIPITATE WITH HCI AND SEPARATING THE ORGANOTIN CHLORIDES THEREBY PRODUCED, (4) MIXING SAID ORGANOTIN CHLORIDES WITH THE AFORESAID UNSAPONIFIED TRIORGANOTIN HALIDE-TETRAORGANOTIN FRACTION AND HEATING THE MIXTURE AT A TEMPERATURE OF FROM 150* TO 240* C., (5) SAPONIFYING THE REACTION PRODUCT FROM (4), AND (6) SEPARATING A PRODUCT SELECTED FROM THE GROUP CONSISTING OF TRIORGANOTIN HYDROXIDE AND HEXAORGANODISTANNOXANE.
Claim 2
Dependent Claim
152 words
IN THE METHOD FOR THE PREPARATION OF TRIORGANOTIN HYDROXIDE AND HEXAORGANODISTANNOXANE BY THE SAPONIFICATION OF AN ORGANOTIN HALIDE MIXTURE COMPRISING TETRAORGANOTIN AND TRIORGANOTIN HALIDE, THE ORGANIC RADICALS ATTACHED TO TIN BEING SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS OF FROM 1 TO 12 INCLUSIVE CARBON ATOMS AND ARYL RADICALS OF FROM 6 TO 10 INCLUSIVE CARBON ATOMS, THE IMPROVEMENT WHICH COMPRISES (1) SEPARATING THE INSOLUBLE PRECIPITATE FROM THE SAPONIFICATION PRODUCT, (2) SEPARATING A FRACTION CONTAINING ANY UNSAPONIFIED TRIORGANOTIN HALIDE AND TETRAORGANOTIN FROM THE LIQUID PORTION OF THE SAPONIFICATION PRODUCT, (3) CONTACTING THE AFORESAID INSOLUBLE PRECIPITATE WITH HCI AND SEPARATING THE ORGANOTIN CHLORIDES THEREBY PRODUCED, (4) MIXING SAID ORGANOTIN CHLORIDES WITH THE AFORESAID UNSAPONIFIED TRIORGANOTIN HALIDE-TETRAORGANOTIN FRACTION AND HEATING THE MIXTURE AT A TEMPERATURE OF FROM 150* TO 240* C., (5) SAPONIFYING THE REACTION PRODUCT FROM (4), AND (6) SEPARATING A PRODUCT SELECTED FROM THE GROUP CONSISTING OF TRIORGANOTIN HYDROXIDE AND HEXAORGANODISTANNOXANE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |