US2426643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for fusing refractory materials
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1944-05-08
•
Granted: 1947-09-02
•
Expires: 1964-05-08
Abstract
No abstract record available.
Inventors
- 👤 Raymond R Ridgway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:14
CPC Classifications
F; F27; F27B; F27B3/00; F27B3/08; F27B3/085; F27B3/10; F27B3/18; F27B3/183; F27D; F27D1/00; F27D1/18; F27D1/1808; F27D1/1816; F27D11/00; F27D11/08; F27D11/10; F27D3/00; F27D3/0025; F27D3/15; F27D3/1509; F27D3/1536; F27B17/00; F27B17/0016; F27B17/0033; F27B3/06; F27B3/065; F27D2003/0034; F27D2003/0059; F27D3/12; F27D2003/125; F27D99/00; F27D2099/0085; F27D2099/0096
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-01 | 1951-03-03 | 1951-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-01 | 1955-03-03 | 1955-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-01 | 1959-03-03 | 1959-09-02 | $7700.00 | Window Closed / Lapsed |