US2592972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1947-06-30
•
Granted: 1952-04-15
•
Expires: 1967-06-30
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Strassheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:53
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/62; B01D29/64; B01D29/6469; B01D29/6476; B01D29/39; B01D29/41; B01D33/00; B01D33/15; B01D33/21; B01D33/70; B01D33/74; B01D33/80; B01D33/801; B01D37/00; B01D37/02
Claims Analysis
Total Claims: 0
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FR780398A
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US2077744A
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US2308716A
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US2430078A
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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) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |