US2789680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: FMC Corp
•
Filing: 1951-09-06
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Granted: 1957-04-23
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Expires: 1971-09-06
Abstract
No abstract record available.
Inventors
- 👤 Charles E Kerr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:04
CPC Classifications
B; B65; B65G; B65G47/00; B65G47/52; B65G47/68; B65G47/71; Y; Y10; Y10S; Y10S198/00; Y10S198/955
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US531501A
Cited
US1768493A
Cited
US1878156A
Cited
US1951400A
Cited
US1974837A
Cited
US2146151A
Cited
US2602533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |