US3849362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Incorporation of fillers in insoluble,infusible oxybenzoyl polymers
Assignee: Unifrax I LLC
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Filing: 1973-09-04
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Granted: 1974-11-19
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Expires: 1993-09-04
Abstract
Abstract 1. A METHOD OF MAKING A FILLED, INSOLUBLE AND INFUSIBLE PARA-OXYBENZOYL POLYMER WHICH COMPRISES PREPARING A DISPERSION OF FILLER AND A SOLUTION OF PARA-HYDROXYBENZOIC ACID AND/OR POLYESTER-FORMING DERIVATIVES THEREOF IN A COMPATIBLE HIGH BOILING SOLVENT, CONDENSING THE PARAHYDROXYBENZOIC ACID AND/OR POLYESTER-FORMING DERIVATIVE AT AN ELEVATED TEMPERATURE TO AN INSOLUBLE AND INFUSIBLE PARA-OXYBENZOYL POLYMER HAVING THE FILLER INCORPORATED THEREIN AND SEPARATING INSOLUBLE AND INFUSIBLE PARA-OXYBENZOYL POLYMER HAVING THE FILLER INCORPORATED THEREIN FROM THE HIGH BOILING SOLVENT.
Inventors
- 👤 J Economy
- 👤 R Storm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:20
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/065; C08K; C08K3/00; C08K3/01; C08K3/013
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A METHOD OF MAKING A FILLED, INSOLUBLE AND INFUSIBLE PARA-OXYBENZOYL POLYMER WHICH COMPRISES PREPARING A DISPERSION OF FILLER AND A SOLUTION OF PARA-HYDROXYBENZOIC ACID AND/OR POLYESTER-FORMING DERIVATIVES THEREOF IN A COMPATIBLE HIGH BOILING SOLVENT, CONDENSING THE PARAHYDROXYBENZOIC ACID AND/OR POLYESTER-FORMING DERIVATIVE AT AN ELEVATED TEMPERATURE TO AN INSOLUBLE AND INFUSIBLE PARA-OXYBENZOYL POLYMER HAVING THE FILLER INCORPORATED THEREIN AND SEPARATING INSOLUBLE AND INFUSIBLE PARA-OXYBENZOYL POLYMER HAVING THE FILLER INCORPORATED THEREIN FROM THE HIGH BOILING SOLVENT.
Claim 2
Independent Claim
74 words
A METHOD OF MAKING A FILLED, INSOLUBLE AND INFUSIBLE PARA-OXYBENZOYL POLYMER WHICH COMPRISES PREPARING A DISPERSION OF FILLER AND A SOLUTION OF PARA-HYDROXYBENZOIC ACID AND/OR POLYESTER-FORMING DERIVATIVES THEREOF IN A COMPATIBLE HIGH BOILING SOLVENT, CONDENSING THE PARAHYDROXYBENZOIC ACID AND/OR POLYESTER-FORMING DERIVATIVE AT AN ELEVATED TEMPERATURE TO AN INSOLUBLE AND INFUSIBLE PARA-OXYBENZOYL POLYMER HAVING THE FILLER INCORPORATED THEREIN AND SEPARATING INSOLUBLE AND INFUSIBLE PARA-OXYBENZOYL POLYMER HAVING THE FILLER INCORPORATED THEREIN FROM THE HIGH BOILING SOLVENT.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |