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US3361262A
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Assignee: Dorr Oliver Inc
•
Filing: 1965-12-30
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Granted: 1968-01-02
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Expires: 1985-12-30
Abstract
No abstract record available.
Inventors
- 👤 Dundas S Orr
- 👤 William R Hrazanek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:50
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/16; B01D33/00; B01D33/15; B01D33/17; B01D33/19; B01D33/44; B01D33/46; B01D33/466; B01D33/70; B01D33/72; B01D33/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE251932C
Cited
DE287513C
Cited
US882202A
Cited
US985611A
Cited
FR437740A
Cited
US2188840A
Cited
US3080063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |