US2972502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection-type cleaning apparatus
Assignee: Diamond Power Specialty Corp
•
Filing: 1953-08-25
•
Granted: 1961-02-21
•
Expires: 1973-08-25
Abstract
No abstract record available.
Inventors
- 👤 Ned L Jennings
- 👤 William F Cantieri
- 👤 John E Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:23
CPC Classifications
F; F28; F28G; F28G1/00; F28G1/12; F23; F23J; F23J3/00; F23J3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1857188A
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US2219011A
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US2272686A
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US2477334A
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US2616766A
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US2730842A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-21 | 1964-08-22 | 1965-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-21 | 1968-08-22 | 1969-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-21 | 1972-08-22 | 1973-02-21 | $7700.00 | Window Closed / Lapsed |