US3291622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory articles
Assignee: Union Carbide Corp
•
Filing: 1965-06-02
•
Granted: 1966-12-13
•
Expires: 1985-06-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Victor Mandorf
- 👤 Ronald W Reidl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:14
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/64; C04B35/645; C04B35/515; C04B35/58; C04B35/5805; C04B35/58064; C04B35/58071; C04B35/583
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A HOT PRESSED ARTICLE FORMED FROM A MIXTURE CONSISTING ESSENTIALLY OF BORON NITRIDE, CALCIUM FLUORIDE IN AN AMOUNT BETWEEN 2 AND 10 PERCENT BY WEIGHT OF THE BORON NITRIDE, AND UP TO 80 PERCENT BY WEIGHT TITANIUM BORIDE.
Claim 2
Dependent Claim
38 words
A HOT PRESSED ARTICLE FORMED FROM A MIXTURE CONSISTING ESSENTIALLY OF BORON NITRIDE, CALCIUM FLUORIDE IN AN AMOUNT BETWEEN 2 AND 10 PERCENT BY WEIGHT OF THE BORON NITRIDE, AND UP TO 80 PERCENT BY WEIGHT TITANIUM BORIDE.
References Cited (Backward Citations)
US2855316A
Cited
US3003885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |