US2391716A
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Assignee: Infilco Inc
•
Filing: 1943-05-07
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Granted: 1945-12-25
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Expires: 1963-05-07
Abstract
No abstract record available.
Inventors
- 👤 Robert J Koupal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:21
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/30; B01D35/301; B01D35/303; B01D24/00; B01D24/02; B01D24/20; B01D24/24; B01D24/46; B01D24/4631
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-12-24 | 1949-06-25 | 1949-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-12-24 | 1953-06-25 | 1953-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-12-24 | 1957-06-25 | 1957-12-25 | $7700.00 | Window Closed / Lapsed |