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Patent US2707474A successfully refreshed from Google Patents.
US2707474A
Expired / Lapsed
US
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Tools for baths of filter cleaners
Assignee: Individual
•
Filing: 1953-04-20
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Granted: 1955-05-03
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Expires: 1973-04-20
Abstract
No abstract record available.
Inventors
- 👤 William K Wiginton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:47
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; F02M35/08; B; B01; B01D; B01D41/00; B01D41/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1476969A
Cited
US2076262A
Cited
GB591025A
Cited
US2450308A
Cited
US2564402A
Cited
US2638381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-02 | 1958-11-01 | 1959-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-02 | 1962-11-01 | 1963-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-02 | 1966-11-01 | 1967-05-03 | $7700.00 | Window Closed / Lapsed |