US2980933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static cleaning and dust and particle removal
Assignee: Individual
•
Filing: 1955-11-08
•
Granted: 1961-04-25
•
Expires: 1975-11-08
Abstract
No abstract record available.
Inventors
- 👤 Samuel M Schwartz
- 👤 Gross Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:01
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/18; D; D06; D06B; D06B17/00; D06B17/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US840802A
Cited
US1110896A
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FR708407A
Cited
US2013714A
Cited
US2300324A
Cited
US2358334A
Cited
US2367715A
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US2576882A
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US2740184A
Cited
US2730113A
Cited
US2752271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |