US3840464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic glass bead carrier material
Assignee: Agfa Gevaert NV
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Filing: 1971-12-29
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Granted: 1974-10-08
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Expires: 1991-12-29
Abstract
Abstract 1. ELECTROSTATIC CARRIER MATERIAL CONSISTING OF GLASS BEADS CONTACTED WITH A SOLUTION OF A TRIALKOXYSILANE OR OF AN ORGANIC PHOSPHOR COMPOUND WHICH IS A BIVALENT OR TRIVALENT METAL SALT OF A PHOSPHPORUS OXYACID CONTAINING AT LEAST ONE ORGANIC GROUP, AND COATED WITH A CONTINUOUS LAYER OF POLYMER CONTAINING REACTIVE HYDROGEN ATOMS.
Inventors
- 👤 Engeland J Van
- 👤 Volder N De
- 👤 D Timmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:02
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/10; G03G9/113; G03G9/1138; G03G9/1132; G03G9/1135; G03G9/1136; G03G9/1137
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
ELECTROSTATIC CARRIER MATERIAL CONSISTING OF GLASS BEADS CONTACTED WITH A SOLUTION OF A TRIALKOXYSILANE OR OF AN ORGANIC PHOSPHOR COMPOUND WHICH IS A BIVALENT OR TRIVALENT METAL SALT OF A PHOSPHPORUS OXYACID CONTAINING AT LEAST ONE ORGANIC GROUP, AND COATED WITH A CONTINUOUS LAYER OF POLYMER CONTAINING REACTIVE HYDROGEN ATOMS.
Claim 2
Dependent Claim
50 words
ELECTROSTATIC CARRIER MATERIAL CONSISTING OF GLASS BEADS CONTACTED WITH A SOLUTION OF A TRIALKOXYSILANE OR OF AN ORGANIC PHOSPHOR COMPOUND WHICH IS A BIVALENT OR TRIVALENT METAL SALT OF A PHOSPHPORUS OXYACID CONTAINING AT LEAST ONE ORGANIC GROUP, AND COATED WITH A CONTINUOUS LAYER OF POLYMER CONTAINING REACTIVE HYDROGEN ATOMS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |