US3814642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of carbon shaped articles
Assignee: Kureha Corp
•
Filing: 1971-12-28
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Granted: 1974-06-04
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Expires: 1991-12-28
Abstract
Abstract MANUFACTURE OF CARBON SHAPED ARTICLE HAVING GAS IMPERMEABILITY, HIGH HARDNESS, AND HIGH MECHANICAL STRENGTH BY MIXING ORGANIC FIBER HAVING PARTICULAR PHYSICAL PROPERTIES WITH ORGANIC BINDER, OR A MIXTURE OF THE ORGANIC BINDER AND AN AGGREGATE, AND HEAT-TREATING THE MIXED MATERIAL.
Inventors
- 👤 T Araki
- 👤 K Asano
- 👤 J Kosugi
- 👤 F Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:43
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/522; C04B35/01; C04B35/013; C04B35/03; C04B35/06; C04B35/16; C04B35/18; C04B35/528; C04B35/532; C04B35/622; C04B35/626; C04B35/62605; C04B35/62645; C04B35/6265; C04B35/62675; C04B35/6268; C04B35/6269; C04B35/63; C04B35/632; C04B35/634; C04B35/63404; C04B35/63416; C04B35/63436; C04B35/63444; C04B35/63448; C04B35/63452; C04B35/6346; C04B35/63472; C04B35/63476; C04B35/636; C04B35/71; C04B35/78; C04B35/80; C04B35/83; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/06; D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/145; D01F9/15; D01F9/155; D01F9/16; D01F9/17; D01F9/20; D01F9/21; D01F9/22; D01F9/24; D01F9/26; D01F9/28; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/327; C04B2235/3272; C04B2235/34; C04B2235/3427; C04B2235/3463; C04B2235/38; C04B2235/3817; C04B2235/3826; C04B2235/46; C04B2235/465; C04B2235/50; C04B2235/52; C04B2235/5208; C04B2235/526; C04B2235/5264; C04B2235/5296; C04B2235/60; C04B2235/602; C04B2235/6021; C04B2235/616; C04B2235/65; C04B2235/656; C04B2235/6562; C04B2235/70; C04B2235/74; C04B2235/77; C04B2235/94; C04B2235/96; C04B2235/9669; C04B2235/9692; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T428/00; Y10T428/30
Claims Analysis
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References Cited (Backward Citations)
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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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |