US2840498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and method for producing combination corrosion resistant and lubricatingcoatings on metals
Assignee: Parker Rust Proof Co
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Filing: 1953-06-08
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Granted: 1958-06-24
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Expires: 1973-06-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Earl Eugene Logue
- 👤 Ernest P Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:09
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A COMPOSITION OF MATTER COMPRISING AN AQUEOUS DISPERSION CONSISTING ESSENTIALLY OF WATER, A MONO-ALIPHATIC PHOSPHORIC ACID ESTER HAVING FROM 8 TO 18 CARBON ATOMS, A METAL ION WHICH FORM A SALT WITH THE SAID PHOSPHATE AND WHICH IS COMPATIBLE WITH SAID DISPERSION IN AN AMOUNT EQUIVALENT TO ABOUT 0.3-11 GRAMS/LITER OF ZINC, AND AN AMINE IN AN AMOUNT SUFFICIENT TO PRODUCE A PH BETWEEN ABOUT 3.0 AND 5.5.
Claim 2
Dependent Claim
68 words
A COMPOSITION OF MATTER COMPRISING AN AQUEOUS DISPERSION CONSISTING ESSENTIALLY OF WATER, A MONO-ALIPHATIC PHOSPHORIC ACID ESTER HAVING FROM 8 TO 18 CARBON ATOMS, A METAL ION WHICH FORM A SALT WITH THE SAID PHOSPHATE AND WHICH IS COMPATIBLE WITH SAID DISPERSION IN AN AMOUNT EQUIVALENT TO ABOUT 0.3-11 GRAMS/LITER OF ZINC, AND AN AMINE IN AN AMOUNT SUFFICIENT TO PRODUCE A PH BETWEEN ABOUT 3.0 AND 5.5.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |