US2991870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Materials processing apparatus
Assignee: Individual
•
Filing: 1956-09-11
•
Granted: 1961-07-11
•
Expires: 1976-09-11
Abstract
No abstract record available.
Inventors
- 👤 Griffith Edwin
- 👤 Edward S Stickley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:25
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/54; B65D88/64; B65D88/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2104617A
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US772941A
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US1703465A
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US1721553A
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US2184248A
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US2321838A
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US2569039A
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US2636284A
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US2692702A
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US2770376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |