US2645630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenylol silane-formaldehyde type resin
Assignee: Dow Silicones Corp
•
Filing: 1952-01-28
•
Granted: 1953-07-14
•
Expires: 1972-01-28
Abstract
No abstract record available.
Inventors
- 👤 Jr John L Speier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:25
CPC Classifications
C; C08; C08G; C08G16/00; C08G16/02; C08G16/0212; C08G16/0218
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A SILYLPHENOL-FORMALDEHYDE TYPE CONDENSATION RESIN COMPRISING THE REACTION PRODUCT OF AN ALKYLSILYLPHENOL, IN WHICH ALL OF THE VALENCIES OF THE SILICON ATOM ARE SATISFIED BY ALKYL RADICALS AND PHENOLIC RADICALS, WITH HEXAMETHYLENETETRAMINE.
Claim 2
Dependent Claim
32 words
A SILYLPHENOL-FORMALDEHYDE TYPE CONDENSATION RESIN COMPRISING THE REACTION PRODUCT OF AN ALKYLSILYLPHENOL, IN WHICH ALL OF THE VALENCIES OF THE SILICON ATOM ARE SATISFIED BY ALKYL RADICALS AND PHENOLIC RADICALS, WITH HEXAMETHYLENETETRAMINE.
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) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |