US3149023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon-filled sheet and method for its manufacture
Assignee: C H Dexter & Sons Inc
•
Filing: 1961-07-19
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Granted: 1964-09-15
•
Expires: 1981-07-19
Abstract
No abstract record available.
Inventors
- 👤 Warren J Bodendorf
- 👤 Fay H Osborne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:43
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; D; D21; D21H; D21H17/00; D21H17/63; D21H17/67; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A CONDUCTOR SHEET CONSISTING OF A BASE SHEET CONTAINING ESSENTIALLY A SUBSTANTIALLY HOMOGENEOUS ADMIXTURE OF CELLULOSIC FIBERS, 30.0-75.0 PERCENT BY WEIGHT OF GRAPHITE PARTICLES FIRMLY BONDED THERETO AND ABOUT 0.25-0.8 PERCENT BY WEIGHT OF A NATURAL GUM, SAID BASE SHEET ADDITIONALLY CONTAINING A MINOR AMOUNT, LESS THAN 10.0 PERCENT BY WEIGHT, OF A CATIONIC STARCH AND BEING IMPREGNATED WITH A RESIN-GRAPHITE MIXTURE, SAID RESIN HAVING A RELATIVELY LOW DIELECTRIC CONSTANT.
Claim 2
Dependent Claim
70 words
A CONDUCTOR SHEET CONSISTING OF A BASE SHEET CONTAINING ESSENTIALLY A SUBSTANTIALLY HOMOGENEOUS ADMIXTURE OF CELLULOSIC FIBERS, 30.0-75.0 PERCENT BY WEIGHT OF GRAPHITE PARTICLES FIRMLY BONDED THERETO AND ABOUT 0.25-0.8 PERCENT BY WEIGHT OF A NATURAL GUM, SAID BASE SHEET ADDITIONALLY CONTAINING A MINOR AMOUNT, LESS THAN 10.0 PERCENT BY WEIGHT, OF A CATIONIC STARCH AND BEING IMPREGNATED WITH A RESIN-GRAPHITE MIXTURE, SAID RESIN HAVING A RELATIVELY LOW DIELECTRIC CONSTANT.
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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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |