Patent US2809197A successfully refreshed from Google Patents.
US2809197A
Expired / Lapsed
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Heavy metal complexes of pyridine-2, 5-dicarboxylic acid esters
Assignee: Phillips Petroleum Co
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Filing: 1954-09-21
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Granted: 1957-10-08
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Expires: 1974-09-21
Abstract
No abstract record available.
Inventors
- 👤 Carl W Kruse
- 👤 Schnitzer Merrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:56
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/79; C07D213/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
AS A NEW COMPOUND A COMPLEX OF AN INORGANIC SALT OF MERCURY OF AND AN ESTER OF A PYRIDINE CARBOXYLIC ACID, THE SAID ESTER BEING CHARACTERIZED BY A STRUCTURAL FORMULA OF THE GROUP
Claim 2
Dependent Claim
33 words
AS A NEW COMPOUND A COMPLEX OF AN INORGANIC SALT OF MERCURY OF AND AN ESTER OF A PYRIDINE CARBOXYLIC ACID, THE SAID ESTER BEING CHARACTERIZED BY A STRUCTURAL FORMULA OF THE GROUP
References Cited (Backward Citations)
US2118864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |