Patent US3842014A successfully refreshed from Google Patents.
US3842014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graphite pellets
Assignee: BP PLC
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Filing: 1972-09-18
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Granted: 1974-10-15
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Expires: 1992-09-18
Abstract
Abstract 1. GRAPHITE/ALUMINA PELLETS CONSISTING ESSENTIALLY OF A GAS OR VACUUM GROUND GRAPHITE OF SURFACE AREA 50-2000 SQUARE METRES PER GRAM, AND, AS A BINDER, ALUMINA OF PSEUDOBOEHMITE STRUCTURE OF CRYSTALLIE SIZE LESS THAN 10 NANOMETERS AND OF SURFACE AREA 200-600 SQUARE METERS PER GRAM.
Inventors
- 👤 G Friend
- 👤 C Geach
- 👤 A Groszek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:08
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; B; B01; B01J; B01J20/00; B01J20/02; B01J20/20; C01; C01B; C01B32/00; C04B35/01; C04B35/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
GRAPHITE/ALUMINA PELLETS CONSISTING ESSENTIALLY OF A GAS OR VACUUM GROUND GRAPHITE OF SURFACE AREA 50-2000 SQUARE METRES PER GRAM, AND, AS A BINDER, ALUMINA OF PSEUDOBOEHMITE STRUCTURE OF CRYSTALLIE SIZE LESS THAN 10 NANOMETERS AND OF SURFACE AREA 200-600 SQUARE METERS PER GRAM.
Claim 2
Dependent Claim
43 words
GRAPHITE/ALUMINA PELLETS CONSISTING ESSENTIALLY OF A GAS OR VACUUM GROUND GRAPHITE OF SURFACE AREA 50-2000 SQUARE METRES PER GRAM, AND, AS A BINDER, ALUMINA OF PSEUDOBOEHMITE STRUCTURE OF CRYSTALLIE SIZE LESS THAN 10 NANOMETERS AND OF SURFACE AREA 200-600 SQUARE METERS PER GRAM.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |