Patent US4509065A successfully refreshed from Google Patents.
US4509065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Record material
Assignee: Wiggins Teape Group Ltd
•
Filing: 1982-11-18
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Granted: 1985-04-02
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Expires: 2002-11-18
Abstract
Abstract A color developer for use in a pressure- or heat-sensitive record material comprises a particulate composite having as components hydrated zirconia and at least one of hydrated silica and hydrated alumina.
Inventors
- 👤 Kenneth J. Shanton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:21
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155; B41M5/1555
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
27 words
Record material carrying a colour developer composition which comprises a particulate composite having as components hydrated zirconia and at least one of hydrated silica and hydrated alumina.
Claim 2
Dependent Claim
27 words
Record material carrying a colour developer composition which comprises a particulate composite having as components hydrated zirconia and at least one of hydrated silica and hydrated alumina.
Claim 3
Dependent Claim
34 words
Record material as claimed in claim 1, characterized in that at least one of the components of the composite is present in a greater proportion in a surface region of the composite than elsewhere.
Claim 4
Dependent Claim
28 words
Record material as claimed in claim 2, characterized in that the composite is modified by the presence of a compound or ions of one or more multivalent metals.
Claim 5
Dependent Claim
28 words
Record material as claimed in claim 1 characterized in that the composite is modified by the presence of a compound or ions of one or more multivalent metals.
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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) | 1988-04-01 | 1988-10-01 | 1989-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-01 | 1992-10-01 | 1993-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-01 | 1996-10-01 | 1997-04-02 | $7700.00 | Window Closed / Lapsed |