US3080248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibitive pigment and method of making same
Assignee: Hammond Lead Products Inc
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Filing: 1960-06-30
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Granted: 1963-03-05
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Expires: 1980-06-30
Abstract
No abstract record available.
Inventors
- 👤 Iii William P Wilke
- 👤 John S Nordyke
- 👤 James O Johnstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:48
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/14; C01; C01P; C01P2004/00; C01P2004/80; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
AS A NEW COMPOSITION OF MATTER, A PIGMENT CONSISTING ESSENTIALLY OF A HYDRATED LEAD SILICATE WITHIN THE RANGES TETRA LEAD SILICATE (4PBO.SI02)-LEAD ORTHOSILICATE (2PBO.SIO2) AND TETRA LEAD SILICATE (4PBO.SIO2)-LITHARGE (PBO) IN COMBINATION WITH THE PRODUCT OF REACTION OF A PORTION OF SAID HYDRATED LEAD SILICATE WITH AN ANION WHICH FORMS AN INSOLUBLE LEAD SALT.
Claim 2
Dependent Claim
54 words
AS A NEW COMPOSITION OF MATTER, A PIGMENT CONSISTING ESSENTIALLY OF A HYDRATED LEAD SILICATE WITHIN THE RANGES TETRA LEAD SILICATE (4PBO.SI02)-LEAD ORTHOSILICATE (2PBO.SIO2) AND TETRA LEAD SILICATE (4PBO.SIO2)-LITHARGE (PBO) IN COMBINATION WITH THE PRODUCT OF REACTION OF A PORTION OF SAID HYDRATED LEAD SILICATE WITH AN ANION WHICH FORMS AN INSOLUBLE LEAD SALT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |