US2892218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spin molding of carbonaceous mix
Assignee: Union Carbide Corp
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Filing: 1955-06-20
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Granted: 1959-06-30
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Expires: 1975-06-20
Abstract
No abstract record available.
Inventors
- 👤 Kenneth B Mcghee
- 👤 Neal J Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:12
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
106 words
A METHOD OF SHAPING GREEN CARBONACEOUS ARTICLES WHICH COMPRISES PROVIDING A HOT CARBONACEOUS MIX COMPRISING COMMINUTED CARBONCEOUS PARTICLES AND A THERMOPLASTIC BINDER IN A ROTATING HEATED MOLD HAVING INTERNALLY LOCATED HEATED MOVABLE SHAPING MEANS; ROTATING SAID MOLD AT A SPEED OF ABOUT 500 ROTATIONS PER MINUTE; COMPRESSING SAID MIX AT A PRESSURE OF ABOUT 1000 POUNDS PER SQUARE INCH AGAINST THE INTERNAL SURFACE OF SAID ROTATING MOLD BY RADIALLY MOVING AFORESAID SHAPING MEANS, AXIALLY MOVING SAID MEANS TO COMPRESS SAID MIX; CONTINUING THE ROTATION OF SAID MOLD UNTIL THE FORMED ARTICLE CAN BE REMOVED WITHOUT BREAKAGE OR DISTORTION, AND EJECTING THE SHAPED ARTICLE FROM SAID MOLD.
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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) | 1962-06-29 | 1962-12-29 | 1963-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-29 | 1966-12-29 | 1967-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-29 | 1970-12-29 | 1971-06-30 | $7700.00 | Window Closed / Lapsed |