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Patent US3136796A successfully refreshed from Google Patents.
US3136796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Werner complex compounds of chromium and polycarboxylic acids
Assignee: EIDP Inc
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Filing: 1961-06-08
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Granted: 1964-06-09
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Expires: 1981-06-08
Abstract
No abstract record available.
Inventors
- 👤 John W Trebilcock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:13
CPC Classifications
C; C07; C07F; C07F11/00; C07F11/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A WERNER COMPLEX COMPOUND OF CHROMIUM AND A POLYCARBOXYLIC ACID HAVING FROM 3 TO 6 CARBOXYL GROUPS AND A TOTAL OF 6 THROUGH 24 CARBON ATOMS, SAID ACID BEING SELECTED FROM THE GROUP CONSISTING OF SATURATED AND ETHYLENICALLY UNSATURATED ALIPHATIC ACIDS, ALICYCLIC ACIDS, AND AROMATIC ACIDS, AND HAVING AS THE SOLE FUNCTIONAL GROUPS ON SAID ACID SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF CARBOXYL AND CARBOXYMETHYL GROUPS.
Claim 2
Dependent Claim
67 words
A WERNER COMPLEX COMPOUND OF CHROMIUM AND A POLYCARBOXYLIC ACID HAVING FROM 3 TO 6 CARBOXYL GROUPS AND A TOTAL OF 6 THROUGH 24 CARBON ATOMS, SAID ACID BEING SELECTED FROM THE GROUP CONSISTING OF SATURATED AND ETHYLENICALLY UNSATURATED ALIPHATIC ACIDS, ALICYCLIC ACIDS, AND AROMATIC ACIDS, AND HAVING AS THE SOLE FUNCTIONAL GROUPS ON SAID ACID SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF CARBOXYL AND CARBOXYMETHYL GROUPS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |