US2978108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filters
Assignee: Individual
•
Filing: 1955-11-07
•
Granted: 1961-04-04
•
Expires: 1975-11-07
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Strassheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:39
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/62; B01D29/66; B01D29/668; B01D29/39; B01D29/41; B01D29/50; B01D29/52; B01D29/56; B01D35/00; B01D35/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2424211A
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US2374953A
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GB575446A
Cited
US2473979A
Cited
US2480518A
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US2540134A
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US2592972A
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US2731152A
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US2697524A
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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) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |