US2673484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for emulsion observation
Assignee: Atlas Powder Co
•
Filing: 1951-07-03
•
Granted: 1954-03-30
•
Expires: 1971-07-03
Abstract
No abstract record available.
Inventors
- 👤 William C Griffin
- 👤 Robert W Behrens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:49
CPC Classifications
G; G01; G01N; G01N33/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1023925A
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US1648369A
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US1513372A
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US1706857A
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US2114460A
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US2253581A
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US2353127A
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US2379158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-29 | 1957-09-28 | 1958-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-29 | 1961-09-28 | 1962-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-29 | 1965-09-28 | 1966-03-30 | $7700.00 | Window Closed / Lapsed |