Patent US3393904A successfully refreshed from Google Patents.
US3393904A
Expired / Lapsed
US
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Travelling grate sintering apparatus and the like
Assignee: HUNTINGTON HEBERLEIN AND Co Ltd
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Filing: 1966-06-27
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Granted: 1968-07-23
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Expires: 1986-06-27
Abstract
No abstract record available.
Inventors
- 👤 Taylor Wilfred Cyril George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:57
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/16; C22B1/20; B; B29; B29C; B29C67/00; B29C67/02; B29C67/04; F; F27; F27B; F27B21/00; F27B21/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |