US3448181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparation of compressed vermicular graphite
Assignee: Dow Chemical Co
•
Filing: 1966-03-30
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Granted: 1969-06-03
•
Expires: 1986-03-30
Abstract
No abstract record available.
Inventors
- 👤 Franciszek Olstowski
- 👤 Kenneth W Guebert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:10
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/536; C01; C01B; C01B32/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1137373A
Cited
US2127994A
Cited
US2888715A
Cited
US2997744A
Cited
US3054662A
Cited
US3107973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |