US2875076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nacreous graphite pigment
Assignee: FRANCIS EARLE LAB Inc
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Filing: 1957-02-07
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Granted: 1959-02-24
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Expires: 1977-02-07
Abstract
No abstract record available.
Inventors
- 👤 Suchow Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:15
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C09; C09C; C09C1/00; C09C1/0015; C09C1/0018
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
66 words
A NACREOUS COMPOSITION HAVING A PIGMENT SUSPENDED THEREIN FOR PRODUCING A LUSTROUS BLACK EFFECT, SAID EFFECT BEING DUE TO THE PRESENCE IN SAID COMPOSITION OF PARTICLES OF FINELY-DIVIDED, PLATE, OPAQUE, CRYSTALLINE GRAPHITE THE GRAPHITE PARTICLES BEING IN THE RANGE OF 1 TO 50 MICRONS IN DIAMETER AND HAVING A THICKNESS NOT GREATER THAN 1 MICRON, THE SAID GRAPHITE PARTICLES BEING SUSPENDED IN A LIGHT-TRANSMITTING, LIQUID VEHICLE.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |