US2704007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid density measuring attachment for photoelectric densitometers
Assignee: GAF Chemicals Corp
•
Filing: 1950-04-04
•
Granted: 1955-03-15
•
Expires: 1970-04-04
Abstract
No abstract record available.
Inventors
- 👤 Karl J Greif
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:12
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/251
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1938544A
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US2044131A
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US2048554A
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US2311101A
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GB552398A
Cited
US2406716A
Cited
US2405483A
Cited
US2447985A
Cited
US2477208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-14 | 1958-09-13 | 1959-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-14 | 1962-09-13 | 1963-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-14 | 1966-09-13 | 1967-03-15 | $7700.00 | Window Closed / Lapsed |