US2925913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: POROLOY EQUIPMENT Inc
•
Filing: 1956-07-30
•
Granted: 1960-02-23
•
Expires: 1976-07-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry L Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:18
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/50; B01D29/52; B01D29/11; B01D29/31; B01D29/33; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0453
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US512931A
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US654592A
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US2220641A
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US2271662A
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US2327805A
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US2562730A
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US2767851A
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US2754005A
Cited
US2720278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |