US2642415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silyl aromatic compounds
Assignee: AT&T Inc
•
Filing: 1951-04-28
•
Granted: 1953-06-16
•
Expires: 1971-04-28
Abstract
No abstract record available.
Inventors
- 👤 Field H Winslow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:17
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/0805
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE STRUCTURE:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE STRUCTURE:
References Cited (Backward Citations)
US2426121A
Cited
US2469154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |