US3389073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vermicular graphite structures and process of making
Assignee: Dow Chemical Co
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Filing: 1966-03-30
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Granted: 1968-06-18
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Expires: 1986-03-30
Abstract
No abstract record available.
Inventors
- 👤 Leonard M Vaught
- 👤 Iii John J Newport
- 👤 Osborn Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:52
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/536; C01; C01B; C01B32/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
51 words
A PROCESS FOR PREPARING AN ELECTRICALLY ORIENTED GRAPHITE STRUCTURE WHICH COMPRISES INTIALLY COMPRESSING VERMICULAR GRAPHITE IN ONE AXIS UNDER SUFFICIENT PRESSURE TO FORM AN INTEGAL STRUCTURE HAVING A DENSITY OF AT LEAST ABOUT 0.25% GM./CC. AND SUBSEQUENTIALLY ISOTATICALLY COMPRISING SUCH INTERGRAL STRUCTURE TO A DENSISTY OF AT LEAST ABOUT 1.5 GMS./CC.
Claim 2
Dependent Claim
51 words
A PROCESS FOR PREPARING AN ELECTRICALLY ORIENTED GRAPHITE STRUCTURE WHICH COMPRISES INTIALLY COMPRESSING VERMICULAR GRAPHITE IN ONE AXIS UNDER SUFFICIENT PRESSURE TO FORM AN INTEGAL STRUCTURE HAVING A DENSITY OF AT LEAST ABOUT 0.25% GM./CC. AND SUBSEQUENTIALLY ISOTATICALLY COMPRISING SUCH INTERGRAL STRUCTURE TO A DENSISTY OF AT LEAST ABOUT 1.5 GMS./CC.
Claim 3
Dependent Claim
42 words
A COMPRESSED VERMICULAR GRAPHITE ARTICLE PREPARED BY COMPRESSSING VERMICULAR GRAPHITE IN ONE VECTOR SUFFICIENTLY TO PRODUCE AN INTEGRAL STRUCTURE HAVING A DENSITY OF AT LEAST ABOUT 0.25 GM./CC. AND SUBSEQUENTLY COMPRESSING SUCH INTERGRAL STRUCTURE ISOSTATICALLY UNDER A PRESSURE GREATER THAN 3500 P.S.I.
Claim 4
Dependent Claim
42 words
A COMPRESSED VERMICULAR GRAPHITE ARTICLE PREPARED BY COMPRESSSING VERMICULAR GRAPHITE IN ONE VECTOR SUFFICIENTLY TO PRODUCE AN INTEGRAL STRUCTURE HAVING A DENSITY OF AT LEAST ABOUT 0.25 GM./CC. AND SUBSEQUENTLY COMPRESSING SUCH INTERGRAL STRUCTURE ISOSTATICALLY UNDER A PRESSURE GREATER THAN 3500 P.S.I.
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) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |