US3072495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion-inhibitive pigment
Assignee: NL Industries Inc
•
Filing: 1960-04-20
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Granted: 1963-01-08
•
Expires: 1980-04-20
Abstract
No abstract record available.
Inventors
- 👤 Adrian R Pitrot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:11
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08; C09D5/082; C09D5/084; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/3045; C09C1/3054; C09D167/00; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2004/80
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
58 words
A PIGMENT PARTICLE CONSISTING ESSENTIALLY OF SILICA COATED WITH COCALCINED OXIDIC COMPOUNDS OF ZINC AND CHROMIUM, SAID SILICA PRESENT FROM ABOUT 25% TO ABOUT 75%, SAID OXIDIC COMPOUND OF ZINC PRESENT FROM ABOUT 12% TO ABOUT 35%, AND SAID OXIDIC COMPOUND OF CHROMIUM PRESENT FROM ABOUT 12% TO ABOUT 38% BASED ON THE TOTAL WEIGHT OF THE PARTICLE.
References Cited (Backward Citations)
GB272582A
Cited
US2068294A
Cited
GB404041A
Cited
US2001448A
Cited
US2415394A
Cited
US2668122A
Cited
US3004857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |