US2657802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material separator
Assignee: Individual
•
Filing: 1949-12-30
•
Granted: 1953-11-03
•
Expires: 1969-12-30
Abstract
No abstract record available.
Inventors
- 👤 Robert R Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:40
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/0217; B01D17/04; B01D17/041; B01D21/00; B01D21/26; B01D21/262; B01D2221/00; B01D2221/04; Y; Y10; Y10T; Y10T137/00; Y10T137/794; Y10T137/8013
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB377353A
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US671517A
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US652594A
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US925856A
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US1262146A
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US1541163A
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US1664769A
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US1747155A
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GB312271A
Cited
US1900394A
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US2336150A
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US2515398A
Cited
US2510781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |