US3787452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxysilanes
Assignee: Novartis Corp
•
Filing: 1972-06-23
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Granted: 1974-01-22
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Expires: 1992-06-23
Abstract
Abstract THE INVENTION RELATES TO EPOXYSILANES OF THE FORMULA I OXIRANYL-CH2-OOC-C<(-A-C(-COO-CH2-CH2-CH2-SI(-(R'')N)- (O-R)(3-N))-) IN WHICH A DENOTES A CYCLOALIPHATIC FIVE-MEMBERED OR SIXMEMBERED RING OR AN AROMATIC RING, R AND R'' EACH DENOTE AN ALKYL GROUP WITH 1 TO 4 CARBON ATOMS AND N DENOTES 0, 1 OR 2, AND THEIR USE IN ADHESIVES, TO WHICH THEY IMPART INCREASED RESISTANCE TO TROPICAL CONDITIONS AND TO WATER/ EMBODIMENTS OF THE INVENTION ARE GLYCIDYLTRIETHOXYSILYL ESTERS OF TETRA- OR HEXA-HYDROPHTHALIC ACID.
Inventors
- 👤 E Leumann
- 👤 H Lehmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:54
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1438; C08G59/145; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C08L; C08L63/00
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |