US3085629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paraffin control coupling
Assignee: Wendell Coffee Co
•
Filing: 1960-08-04
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Granted: 1963-04-16
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Expires: 1980-08-04
Abstract
No abstract record available.
Inventors
- 👤 Don A Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:31
CPC Classifications
E; E21; E21B; E21B37/00; E21B17/00; E21B17/02; E21B17/04; F; F16; F16K; F16K15/00; F16K15/02; F16K15/04; F16K15/042; F16K2200/00; F16K2200/20; F16K2200/203; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/7845
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2300348A
Cited
US2526346A
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US2568087A
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US2626177A
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US2740481A
Cited
US2968351A
Cited
US2954827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |