US2861792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintering apparatus
Assignee: Dravo Corp
•
Filing: 1955-11-15
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Granted: 1958-11-25
•
Expires: 1975-11-15
Abstract
No abstract record available.
Inventors
- 👤 John H Porteus
- 👤 John A Anthes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:17
CPC Classifications
F; F27; F27B; F27B21/00; F27B21/02; C; C22; C22B; C22B1/00; C22B1/14; C22B1/16; C22B1/20; F27B21/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB222748A
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US1896625A
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US2273821A
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US2254323A
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US2710183A
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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) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |