US3470679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Workbench with filtered laminar flow of clean air
Assignee: Ramney Ind Corp
•
Filing: 1967-10-17
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Granted: 1969-10-07
•
Expires: 1987-10-17
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Ramsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:38
CPC Classifications
B; B25; B25H; B25H1/00; B25H1/20; F; F24; F24F; F24F3/00; F24F3/12; F24F3/16; F24F3/163; Y; Y10; Y10S; Y10S55/00; Y10S55/29
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3273323A
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US3229611A
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US3318076A
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US3284148A
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US3368523A
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US3360910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |