US3425490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning assembly
Assignee: GLEN G CLAYTON
•
Filing: 1968-04-26
•
Granted: 1969-02-04
•
Expires: 1988-04-26
Abstract
No abstract record available.
Inventors
- 👤 Glen G Clayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:52
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/08; E21B43/082; F; F04; F04B; F04B53/00; F04B53/10; F04B53/1037
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US131500A
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US139018A
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US166048A
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US541846A
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US1899065A
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US2257344A
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US2335558A
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US3314481A
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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) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |