Patent US3276916A successfully refreshed from Google Patents.
US3276916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibition of corrosion of metal surfaces
Assignee: Lubrizol Corp
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Filing: 1963-06-10
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Granted: 1966-10-04
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Expires: 1983-06-10
Abstract
No abstract record available.
Inventors
- 👤 Robert G Wurstner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:24
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/82; C23C22/83; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/091; C23C22/05; C23C22/06; C23C22/07; C23C22/08; C23C22/22; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/167; C23F11/1673
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A METHOD FOR INHIBITING THE CORROSION OF A METAL SURFACE WHICH COMPRISES APPLYING TO SAID SURFACE A FILM OF A METAL-CONTAINING ORGANIC PHOSPHATE COMPLEX PREPARED BY THE PROCESS WHICH COMPRISES THE REACTION OF: (A) A POLYVALENT METAL SALT SELECTED FROM THE GROUP CONSISTING OF ZINC, CADMIUM, LEAD, IRON, COBALT, NICKEL, BARIUM, CALCIUM, STRONTIUM, MAGNESIUM, COPPER, BISMUTH, TIN, CHROMIUK, AND MANGANESE SALTS OF THE ACID PHOSPHATE ESTERS DERIVED FROM THE REACTION OF PHOSPHORUS PENTOXIDE WITH A MIXTURE OF A MONOHYDRIC ALCOHOL SELECTED FROM THE GROUP CONSISTING OF SATURATED ALIPHATIC AND CYCLOALIPHATIC ALCOHOLS CONTAINING FROM ABOUT 3 TO ABOUT 18 CARBON ATOMS, AND FROM 0.25 TO 4.0 EQUIVALENTS OF A POLYHYDRIC ALCOHOL HAVING FROM 2 TO ABOUT 4 HYDROXYL GROUPS AND CONTAINING FROM ABOUT 2 TO ABOUT 41 CARBON ATOMS, WITH (B) AT LEAST ABOUT 0.1 EQUIVALENT OF AN ORGANIC EPOXIDE CONTAINING FROM ABOUT 2 TO ABOUT 57 CARBON ATOMS AND SELECTED FROM THE GROUP CONSISTING OF EPOXY ALKANES, EPOXY ALKYL CARBOXYLIC ACIDS, LACTONES, STYRENE OXIDE, AND ALPHA-METHYL STYRENE OXIDE.
Claim 2
Independent Claim
168 words
A METHOD FOR INHIBITING THE CORROSION OF A METAL SURFACE WHICH COMPRISES APPLYING TO SAID SURFACE A FILM OF A METAL-CONTAINING ORGANIC PHOSPHATE COMPLEX PREPARED BY THE PROCESS WHICH COMPRISES THE REACTION OF: (A) A POLYVALENT METAL SALT SELECTED FROM THE GROUP CONSISTING OF ZINC, CADMIUM, LEAD, IRON, COBALT, NICKEL, BARIUM, CALCIUM, STRONTIUM, MAGNESIUM, COPPER, BISMUTH, TIN, CHROMIUK, AND MANGANESE SALTS OF THE ACID PHOSPHATE ESTERS DERIVED FROM THE REACTION OF PHOSPHORUS PENTOXIDE WITH A MIXTURE OF A MONOHYDRIC ALCOHOL SELECTED FROM THE GROUP CONSISTING OF SATURATED ALIPHATIC AND CYCLOALIPHATIC ALCOHOLS CONTAINING FROM ABOUT 3 TO ABOUT 18 CARBON ATOMS, AND FROM 0.25 TO 4.0 EQUIVALENTS OF A POLYHYDRIC ALCOHOL HAVING FROM 2 TO ABOUT 4 HYDROXYL GROUPS AND CONTAINING FROM ABOUT 2 TO ABOUT 41 CARBON ATOMS, WITH (B) AT LEAST ABOUT 0.1 EQUIVALENT OF AN ORGANIC EPOXIDE CONTAINING FROM ABOUT 2 TO ABOUT 57 CARBON ATOMS AND SELECTED FROM THE GROUP CONSISTING OF EPOXY ALKANES, EPOXY ALKYL CARBOXYLIC ACIDS, LACTONES, STYRENE OXIDE, AND ALPHA-METHYL STYRENE OXIDE.
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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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |