US2622072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polysiloxane resins by hydrolysis of halosilanes in contact with methylene chloride
Assignee: Dow Silicones Corp
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Filing: 1950-06-08
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Granted: 1952-12-16
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Expires: 1970-06-08
Abstract
No abstract record available.
Inventors
- 👤 Arthur F Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:18
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
THE METHOD OF MAKING A POLUSILOXANE RESIN FROM A MIXTURE OF HYDROLYZABLE ORGANOSILANES CONTAINING AN AVERAGE OF FROM 1.0 OT 1.8 INCLUSIVE ORGANIC RADICALS BONDED TO SILICON PER SILICON ATOM, THE INDIVIDUAL MEMBERS OF THE MIXTURE HAVING THE GENERAL FORMULA RNSIX4-N, WHERE EACH R IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL AND MONOCYCLIC ARYL RADICALS, N IS AN INTEGER OF FROM 1 TO 2, AND EACH X REPRESENTS A RADICAL OF THE GROUP CONSISTING OF CHLORINE AND ALKOXY RADICALS, WHICH COMPRISES HYDROZLYZING THE MIXTURE WITH WATER IN CONTACT WITH METHYLENE CHLORIDE, SAID METHYLENE CHLORIDE BEING PRESENT IN AN AMOUNT SUFFICIENT TO FORM A SOLUTION OF LESS THAN 60 PER CENT BY WEIGHT OF THE POLYSILOXANE RESIN FORMED AND SAID WATER BEING PRESENT IN A QUANTITY AT LEAST SUFFICIENT FOR THE COMPLETE HYDROLYSIS OF THE SILANES.
Claim 2
Independent Claim
138 words
THE METHOD OF MAKING A POLUSILOXANE RESIN FROM A MIXTURE OF HYDROLYZABLE ORGANOSILANES CONTAINING AN AVERAGE OF FROM 1.0 OT 1.8 INCLUSIVE ORGANIC RADICALS BONDED TO SILICON PER SILICON ATOM, THE INDIVIDUAL MEMBERS OF THE MIXTURE HAVING THE GENERAL FORMULA RNSIX4-N, WHERE EACH R IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL AND MONOCYCLIC ARYL RADICALS, N IS AN INTEGER OF FROM 1 TO 2, AND EACH X REPRESENTS A RADICAL OF THE GROUP CONSISTING OF CHLORINE AND ALKOXY RADICALS, WHICH COMPRISES HYDROZLYZING THE MIXTURE WITH WATER IN CONTACT WITH METHYLENE CHLORIDE, SAID METHYLENE CHLORIDE BEING PRESENT IN AN AMOUNT SUFFICIENT TO FORM A SOLUTION OF LESS THAN 60 PER CENT BY WEIGHT OF THE POLYSILOXANE RESIN FORMED AND SAID WATER BEING PRESENT IN A QUANTITY AT LEAST SUFFICIENT FOR THE COMPLETE HYDROLYSIS OF THE SILANES.
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) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |