Patent US3013902A successfully refreshed from Google Patents.
US3013902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic polymer coated, alumina bonded fibrous base
Assignee: EIDP Inc
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Filing: 1959-04-13
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Granted: 1961-12-19
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Expires: 1979-04-13
Abstract
No abstract record available.
Inventors
- 👤 Bugosh John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:36
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/32; D06M11/36; D06M11/45; D06Q; D06Q1/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2947; Y10T428/2949; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T442/00; Y10T442/20; Y10T442/2041; Y10T442/2098; Y10T442/2107; Y10T442/2861; Y10T442/2885; Y10T442/2893
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A FIBROUS SUBSTRATE BEARING A BASECOAT OF ALUMINA PARTICLES, SAID ALUMINA PARTICLES BEING LESS THAN 1.5 MICRONS IN LARGEST AVERAGE DIMENSION AND HAVING AN AVERAGE SPECIFIC SURFACE AREA OF AT LEAST 10 SQUARE METERS PER GRAM AND A TOPCOAT OF AN ORGANIC POLYMER CONTAINING IONIC CARBOXYLIC ACID RADICALS, SAID ORGANIC POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST 500 AND HAVING AT LEAST 1 WEIGHT PERCENT OF LATERAL FREE CARBOXYLIC ACID RADICALS, AND SAID FIBROUS SUBSTRATE BEING A MATERIAL WHICH, WITHOUT THE ALUMINA BASE COAT, IS NEGATIVELY CHARGED WITH RESPECT TO THE ALUMINA PARTICLES.
Claim 2
Dependent Claim
94 words
A FIBROUS SUBSTRATE BEARING A BASECOAT OF ALUMINA PARTICLES, SAID ALUMINA PARTICLES BEING LESS THAN 1.5 MICRONS IN LARGEST AVERAGE DIMENSION AND HAVING AN AVERAGE SPECIFIC SURFACE AREA OF AT LEAST 10 SQUARE METERS PER GRAM AND A TOPCOAT OF AN ORGANIC POLYMER CONTAINING IONIC CARBOXYLIC ACID RADICALS, SAID ORGANIC POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST 500 AND HAVING AT LEAST 1 WEIGHT PERCENT OF LATERAL FREE CARBOXYLIC ACID RADICALS, AND SAID FIBROUS SUBSTRATE BEING A MATERIAL WHICH, WITHOUT THE ALUMINA BASE COAT, IS NEGATIVELY CHARGED WITH RESPECT TO THE ALUMINA PARTICLES.
References Cited (Backward Citations)
US2085139A
Cited
US2323387A
Cited
US2560707A
Cited
US2734835A
Cited
US2734834A
Cited
US2819177A
Cited
US2915475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-18 | 1965-06-19 | 1965-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-18 | 1969-06-19 | 1969-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-18 | 1973-06-19 | 1973-12-19 | $7700.00 | Window Closed / Lapsed |