US2618671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunnel kiln
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1949-01-18
•
Granted: 1952-11-18
•
Expires: 1969-01-18
Abstract
No abstract record available.
Inventors
- 👤 Pyl Edward Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:34
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/14; F27B9/20; F27B9/30; F27B9/36; F27B2009/3638; F27B9/06; F27B9/062; F27B9/063; F27B9/24; F27B9/2469; F27B9/26; F27M; F27M2001/00; F27M2001/15; F27M2001/1504; F27M2001/1534
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) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |