Patent US619545A successfully refreshed from Google Patents.
Patent US3305525A successfully refreshed from Google Patents.
US3305525A
Expired / Lapsed
US
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Method for making organosilicon polymers
Assignee: —
•
Filing: —
•
Granted: 1967-02-21
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Expires: 1984-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:00
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/26; C08G77/14; C08G77/16; A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/84; A61K8/89; A61K8/896; A61K8/898; C08L; C08L83/00; C08L83/04; C08L83/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A METHOD FOR MAKING ORGANOSILICON GUMS SUBSTANTIALLY FREE OF VOLATILES WHICH COMPRISES (1) MIXING TOGETHER AT A TEMPERATURE IN THE RANGE OF BETWEEN 0*C. TO 200*C. UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, AND IN THE SUBSTANTIAL ABSENCE OF AN INERT ORGANIC SOLVENT, (A) A DIFUNCTIONAL SILYLAMINE AND (B) A SILANOL-CONTAINING ORGANOSILICON MATERIAL AND (2) ALLOWING SAID MIXTURE OF (1) TO ACHIEVE A VISCOSITY OF AT LEAST 500,000 CEMTIPOISES AT 25*C., WHERE (A) IS A MEMBER SELECTED FROM THE CLASS CONSISTING OF A SILYLAMINE OF THE FORMULA,
Claim 2
Independent Claim
84 words
A METHOD FOR MAKING ORGANOSILICON GUMS SUBSTANTIALLY FREE OF VOLATILES WHICH COMPRISES (1) MIXING TOGETHER AT A TEMPERATURE IN THE RANGE OF BETWEEN 0*C. TO 200*C. UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, AND IN THE SUBSTANTIAL ABSENCE OF AN INERT ORGANIC SOLVENT, (A) A DIFUNCTIONAL SILYLAMINE AND (B) A SILANOL-CONTAINING ORGANOSILICON MATERIAL AND (2) ALLOWING SAID MIXTURE OF (1) TO ACHIEVE A VISCOSITY OF AT LEAST 500,000 CEMTIPOISES AT 25*C., WHERE (A) IS A MEMBER SELECTED FROM THE CLASS CONSISTING OF A SILYLAMINE OF THE FORMULA,
References Cited (Backward Citations)
US2429883A
Cited
US3043798A
Cited
GB905364A
Cited
US3202634A
Cited
US3133110A
Cited
US3146251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |