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US2885712A
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Automatic cleaning apparatus
Assignee: MW Kellogg Co
•
Filing: 1956-05-11
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Granted: 1959-05-12
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Expires: 1976-05-11
Abstract
No abstract record available.
Inventors
- 👤 Robert H Shoulberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:35
CPC Classifications
F; F23; F23J; F23J3/00; F23J3/02; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB576077A
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US1556495A
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US2066014A
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US1053871A
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US1183417A
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US1458968A
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US1901804A
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US1987972A
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US2519542A
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US2722033A
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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) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |