US3226241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alumina refractories
Assignee: —
•
Filing: —
•
Granted: 1965-12-28
•
Expires: 1982-12-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:09
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18; C04B35/622; C04B35/626; C04B35/62605; C04B35/62645; C04B35/62665; C04B35/66; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3217; C04B2235/3222; C04B2235/34; C04B2235/3418; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5427; C04B2235/5436; C04B2235/5463; C04B2235/5472
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
23 words
A FIRED HIGH ALUMINA REFRACTORY BODY PREPARED FROM A SIZE GRADED HIGH ALUMINA REFRACTORY MIX HAVING THE FOLLOWING COMPOSITION (ALL PERCENTAGES BY WEIGHT):
References Cited (Backward Citations)
US2899323A
Cited
US3067050A
Cited
US2339454A
Cited
US2428178A
Cited
US2695849A
Cited
US2672671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |