US2581277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1946-12-17
•
Granted: 1952-01-01
•
Expires: 1966-12-17
Abstract
No abstract record available.
Inventors
- 👤 Gottlieb J Morgenthaler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:45
CPC Classifications
B; B01; B01D; B01D35/00; B01D29/00; B01D29/01; B01D29/05; B01D29/055; B01D29/50; B01D29/56; B01D29/58; B01D35/18; B01D2201/00; B01D2201/30; B01D2201/309
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2007615A
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US2262527A
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US2200795A
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US2211305A
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US2415246A
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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) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |