US3494110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressed air cleaning system for turbine powered dental equipment
Assignee: Oklahoma State University
•
Filing: 1968-02-19
•
Granted: 1970-02-10
•
Expires: 1988-02-19
Abstract
No abstract record available.
Inventors
- 👤 Robert E Reed
- 👤 Ernest C Fitch Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:12
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/02; A61C1/05; A61C1/052
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1566084A
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US1866659A
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DE736004C
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US2583456A
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US2566662A
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FR1008940A
Cited
US2568032A
Cited
US2754968A
Cited
US2966232A
Cited
US3235090A
Cited
US3250005A
Cited
US3283480A
Cited
US3395511A
Cited
US3282046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |