Patent US3794707A successfully refreshed from Google Patents.
US3794707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of refractory artefacts
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1971-08-23
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Granted: 1974-02-26
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Expires: 1991-08-23
Abstract
Abstract A REFRACTORY ARTEFACT IS MADE BY TAKING A MIX OF A REFRACTORY POWDER WITH A BINDER OR BINDER MIXTURE HAVING PLASTIC AND SETTING PROPERTIES; FORMING A GREEN ARTEFACT FROM THE MIX, E.G. BY MAKING AND LAYING UP SHEETS; CURING THE SETTING BINDER, E.G. BY HEAT, TO FORM A HARD CURED ARTEFACT; MACHINING IF NECESSARY AND THEN HEATING TO SINTER THE ARTEFACT. THE SINTERING STEP MAY INCLUDE NITRIDING.
Inventors
- 👤 Neill J O
- 👤 C Silverstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:05
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/584; C04B35/591; B; B21; B21B; B21B39/00; B21B39/20; C04B33/00; C04B33/02; C04B33/13; C04B33/1315
Claims Analysis
Total Claims: 0
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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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |