Patent US4570486A successfully refreshed from Google Patents.
US2270352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid containing silicyl derivatives
Assignee: INTERNAT ENGINEERING CORP
•
Filing: 1937-04-26
•
Granted: 1942-01-20
•
Expires: 1957-04-26
Abstract
No abstract record available.
Inventors
- 👤 Frank J Sowa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:03
CPC Classifications
C; C10; C10M; C10M3/00; C07; C07F; C07F7/00; C07F7/02; C07F7/04; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/04; C10M2207/046; C10M2227/00; C10M2227/02; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1945-01-19 | 1945-07-21 | 1946-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-01-19 | 1949-07-21 | 1950-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-01-19 | 1953-07-21 | 1954-01-20 | $7700.00 | Window Closed / Lapsed |