Patent US2500843A successfully refreshed from Google Patents.
US2500843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition of urea-formaldehyde and organosilicon compound
Assignee: Ellis Foster Co
•
Filing: 1944-03-10
•
Granted: 1950-03-14
•
Expires: 1964-03-10
Abstract
No abstract record available.
Inventors
- 👤 Charles A Mackenzie
- 👤 John B Rust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:54
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; C08K5/541; C08K5/5415
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A COMPOSITION COMPRISING A UREA-FORMALDEHYDE RESIN, A SOLVENT, AND A SILICON DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF DIETHYL DIETHOXY SILICANE AND AN ALKYL ALKANE ORTHOSILICONATE IN WHICH THE ALKANE HAS FROM ONE TO FIVE CARBON ATOMS AND THE ALKYL FROM ONE TO TWO CARBON ATOMS, SAID SILICON DERIVATIVE BEING PRESENT IN AN AMOUNT OF LESS THAN 50% ON THE WEIGHT OF THE RESIN.
Claim 2
Dependent Claim
64 words
A COMPOSITION COMPRISING A UREA-FORMALDEHYDE RESIN, A SOLVENT, AND A SILICON DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF DIETHYL DIETHOXY SILICANE AND AN ALKYL ALKANE ORTHOSILICONATE IN WHICH THE ALKANE HAS FROM ONE TO FIVE CARBON ATOMS AND THE ALKYL FROM ONE TO TWO CARBON ATOMS, SAID SILICON DERIVATIVE BEING PRESENT IN AN AMOUNT OF LESS THAN 50% ON THE WEIGHT OF THE RESIN.
References Cited (Backward Citations)
US2313678A
Cited
US2375998A
Cited
US2053474A
Cited
US2258218A
Cited
US2371050A
Cited
US2382082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |