Patent US3331777A successfully refreshed from Google Patents.
US3331777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass frits and enamels having esterified surfaces and their preparation
Assignee: EIDP Inc
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Filing: 1964-07-31
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Granted: 1967-07-18
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Expires: 1984-07-31
Abstract
No abstract record available.
Inventors
- 👤 Lewis C Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:41
CPC Classifications
C; C03; C03C; C03C4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A POWDER EXHIBITING IMPROVED ELECTROSTATIC TRANSFER PERFORMANCE UNDER LOW HUMIDITY CONDITIONS, SAID POWDER CONSISTING ESSENTIALLY OF PATICLES SELECTED FROM THE GROUP CONSISTING OF LEAD BOROSILICATE FRIT PARTICLES AND COMPOSITE LEAD BOROSILICATE-BASED ENAMEL PARTICLES, SAID SELECTED PARTICLES HAVING SURFACES WHICH HAVE BEEN ESTERIFIED BY REACTION WITH AN EXCESS OF AN ALCOHOL OF THE GROUP CONSISTING OF:
Claim 2
Dependent Claim
55 words
A POWDER EXHIBITING IMPROVED ELECTROSTATIC TRANSFER PERFORMANCE UNDER LOW HUMIDITY CONDITIONS, SAID POWDER CONSISTING ESSENTIALLY OF PATICLES SELECTED FROM THE GROUP CONSISTING OF LEAD BOROSILICATE FRIT PARTICLES AND COMPOSITE LEAD BOROSILICATE-BASED ENAMEL PARTICLES, SAID SELECTED PARTICLES HAVING SURFACES WHICH HAVE BEEN ESTERIFIED BY REACTION WITH AN EXCESS OF AN ALCOHOL OF THE GROUP CONSISTING OF:
References Cited (Backward Citations)
US2736669A
Cited
US2657149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |