US2534518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heated tunnel kiln
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1949-04-01
•
Granted: 1950-12-19
•
Expires: 1969-04-01
Abstract
No abstract record available.
Inventors
- 👤 George N Jeppson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:41
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/14; F27B9/20; F27B9/26; E; E04; E04B; E04B2/00; E04B2/02; E04B2/42; E04B2/44; E04B2/46; E04B2/52; F27B9/06; F27B9/061; F27B9/062; F27B9/063; F27B9/147; F27D; F27D3/00; F27D3/12; E04B2002/0202; E04B2002/0204; E04B2002/0208; F27D2003/124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |