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Patent US3177237A successfully refreshed from Google Patents.
US3177237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon and germanium chelates of tropolones
Assignee: EIDP Inc
•
Filing: 1963-07-01
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Granted: 1965-04-06
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Expires: 1983-07-01
Abstract
No abstract record available.
Inventors
- 👤 Earl L Muetterties
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:38
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/30; C07C; C07C45/00; C07C45/77; C07C49/00; C07C49/92; C07F7/003; C07F7/02; C07F7/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |