US3251999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric system for measuring the density of smoke
Assignee: Oscar Mayer Foods Corp
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Filing: 1962-11-26
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Granted: 1966-05-17
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Expires: 1982-11-26
Abstract
No abstract record available.
Inventors
- 👤 Frederic H Middleton
- 👤 Robert H Wandel
- 👤 James A Valesh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:45
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/01; G01N21/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |