Patent US3456785A successfully refreshed from Google Patents.
US3456785A
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US
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Assignee: WILFRED L ROLLER
•
Filing: 1965-08-11
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Granted: 1969-07-22
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Expires: 1985-08-11
Abstract
No abstract record available.
Inventors
- 👤 Wilfred L Roller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:41
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/04; B01; B01D; B01D35/00; B01D35/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US161147A
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US1279630A
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US1294309A
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US2600508A
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US2893557A
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US2817439A
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US3246749A
Cited
US3084796A
Cited
US3363769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |