US2959932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Density control apparatus
Assignee: Industrial Nucleonics Corp
•
Filing: 1957-02-20
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Granted: 1960-11-15
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Expires: 1977-02-20
Abstract
No abstract record available.
Inventors
- 👤 Spergel Philip
- 👤 David A Bossen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
A; A23; A23G; A23G9/00; A23G9/04; A23G9/20; A23G9/22; A23G9/228; G; G05; G05D; G05D24/00; G05D24/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1965616A
Cited
US2501174A
Cited
US2530981A
Cited
US2565121A
Cited
US2763789A
Cited
US2773349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |