US3819745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coatings giving controlled release
Assignee: Dow Silicones Corp
•
Filing: 1972-03-27
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Granted: 1974-06-25
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Expires: 1992-03-27
Abstract
Abstract A COMPOSITION CONSISTING ESSENTIALLY OF A COPOLYMER COMPOSED OF SIO2 UNITS AND (CH3)3SIO1/2 UNITS AND A BLOCK COPOLYMER CONSISTING OF AN ESSENTIALLY LINEAR PORTION AND AN ESSENTIALLY RESINOUS PORTION HAS BEEN FOUND USEFUL AS A RELEASE COATING ON VARIOUS SUBSTRATES ESPECIALLY CELLULOSIC SUBSTRATES TO OBTAIN CONTROLLED RELEASE VALUES.
Inventors
- 👤 F Plante
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:30
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/10; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |