US2825872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particle analyzing apparatus
Assignee: DeVilbiss Co
•
Filing: 1953-06-23
•
Granted: 1958-03-04
•
Expires: 1973-06-23
Abstract
No abstract record available.
Inventors
- 👤 Harry E Stubbs
- 👤 Herbert H Canfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:20
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/10; G01N15/1031
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1168227A
Cited
US1405122A
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US1670640A
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US2285152A
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US2491445A
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US2601649A
Cited
US2666896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |