US3413239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vermicular graphite structures and method of making
Assignee: Dow Chemical Co
•
Filing: 1966-03-03
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Granted: 1968-11-26
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Expires: 1986-03-03
Abstract
No abstract record available.
Inventors
- 👤 Olstowski Franciszek
- 👤 Osborn Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:01
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/02; C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/536; F28F13/00; F28F13/003; Y; Y10; Y10S; Y10S165/00; Y10S165/905
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |