Patent US3726738A successfully refreshed from Google Patents.
US3726738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a carbonized material of expanded graphite and carbon fibers
Assignee: Individual
•
Filing: 1970-08-21
•
Granted: 1973-04-10
•
Expires: 1990-08-21
Abstract
Abstract A METHOD OF MANUFACTURING A CARBONISED MATERIAL WHICH IS RESILIENT AND RESISTANT TO HIGH TEMPERATURES CONSISTS IN CLOSELY COMBINING TOGETHER EXPANDED GRAPHITE AND CARBON FIBRES.
Inventors
- 👤 J Gellon
- 👤 J Slonina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:06
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/536; C04B35/71; C04B35/78; C04B35/80; C04B35/83; D; D01; D01F; D01F11/00; D01F11/10; D01F11/12; D01F11/125; Y; Y10; Y10S; Y10S264/00; Y10S264/19; Y10S428/00; Y10S428/92; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/29; Y10T428/2904; Y10T428/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |