US2829733A
Expired / Lapsed
US
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Assignee: Research Products Corp
•
Filing: 1953-08-18
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Granted: 1958-04-08
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Expires: 1973-08-18
Abstract
No abstract record available.
Inventors
- 👤 Fred L Bartels
- 👤 Robert A Niemann
- 👤 Carl B Rowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:53
CPC Classifications
B; B01; B01D; B01D46/00; B01D24/00; B01D24/001; B01D25/00; B01D25/001; B01D39/00; B01D39/14; B01D39/20; B01D39/2027; B01D24/02; B01D24/10; Y; Y10; Y10T; Y10T29/00; Y10T29/14; Y10T29/142; Y10T29/18; Y10T428/00; Y10T428/12; Y10T428/12333; Y10T428/12361; Y10T428/12424; Y10T428/12431; Y10T428/12479; Y10T428/24; Y10T428/24273; Y10T428/249921; Y10T428/249922; Y10T428/249953; Y10T428/249967
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1490544A
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US1499985A
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US1676191A
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US1774232A
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US2070073A
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US2334263A
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US2382560A
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US2558185A
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US2683500A
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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) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |