US2569430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture
Assignee: —
•
Filing: —
•
Granted: 1951-09-25
•
Expires: 1968-09-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:04
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18; C04B35/10; C04B35/622; C04B35/626; C04B35/62605; C04B35/62645; C04B35/62665; C04B35/63; C04B35/6303; C04B35/66; F; F27; F27D; F27D1/00; F27D1/0003; F27D1/0006; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3217; C04B2235/3222; C04B2235/34; C04B2235/3418; C04B2235/349; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5436
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A BONDED REFRACTORY ARTICLE COMPRISING GRANULAR FUSED ALUMINA AND A CERAMIC BOND, SAID GRANULAR FUSED ALUMINA CONTAINING 2% TO 8% SILICA AND BEING OTHERWISE SUBSTANTIALLY PURE ALUMINUM OXIDE.
Claim 2
Dependent Claim
28 words
A BONDED REFRACTORY ARTICLE COMPRISING GRANULAR FUSED ALUMINA AND A CERAMIC BOND, SAID GRANULAR FUSED ALUMINA CONTAINING 2% TO 8% SILICA AND BEING OTHERWISE SUBSTANTIALLY PURE ALUMINUM OXIDE.
References Cited (Backward Citations)
GB551421A
Cited
US2272618A
Cited
FR377964A
Cited
US2019209A
Cited
FR787931A
Cited
US2017056A
Cited
FR47611E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |