Patent US2529956A successfully refreshed from Google Patents.
US2529956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making silicon ester resins
Assignee: Imperial Chemical Industries Ltd
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Filing: 1946-08-06
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Granted: 1950-11-14
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Expires: 1966-08-06
Abstract
No abstract record available.
Inventors
- 👤 Myles James Robertson
- 👤 Ray Neil Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:52
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
THE METHOD OF PREPARING AN ORGANOSILOXANE POLYMER WHICH COMPRISES ADMIXING SUBSTANTIALLY ANHYDROUS TERTIARY BUTYL ALCOHOL WITH A HYDROLYZABLE CHLOROSILICIC ESTER OF THE FORMULA (RO)NSICL4-N, WHEREIN R IS A MONOVALENT RADICAL FROM THE GROUP CONSISTING OF SECONDARY ALKYL AND CYCLOALKYL AND N IS AN INTEGER FROM 1 TO 3 INCLUSIVE, REACTING THE ABOVE TWO COMPOUNDS WITH THE APPLICATION OF HEAT, AND SEPARATING THE RESULTING ORGANO-SILOXANE POLYMER.
Claim 2
Independent Claim
65 words
THE METHOD OF PREPARING AN ORGANOSILOXANE POLYMER WHICH COMPRISES ADMIXING SUBSTANTIALLY ANHYDROUS TERTIARY BUTYL ALCOHOL WITH A HYDROLYZABLE CHLOROSILICIC ESTER OF THE FORMULA (RO)NSICL4-N, WHEREIN R IS A MONOVALENT RADICAL FROM THE GROUP CONSISTING OF SECONDARY ALKYL AND CYCLOALKYL AND N IS AN INTEGER FROM 1 TO 3 INCLUSIVE, REACTING THE ABOVE TWO COMPOUNDS WITH THE APPLICATION OF HEAT, AND SEPARATING THE RESULTING ORGANO-SILOXANE POLYMER.
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) | 1953-11-13 | 1954-05-15 | 1954-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-13 | 1958-05-15 | 1958-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-13 | 1962-05-15 | 1962-11-14 | $7700.00 | Window Closed / Lapsed |