US3437146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing paraffin from a well with heated solvent
Assignee: Midwest Chemical and Processing Co Inc
•
Filing: 1968-01-11
•
Granted: 1969-04-08
•
Expires: 1988-01-11
Abstract
No abstract record available.
Inventors
- 👤 Clifford R Everhart
- 👤 Audra B Cary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:13
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; C09K8/524; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/929; Y10S507/931
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3127345A
Cited
US411478A
Cited
US1844883A
Cited
US2223141A
Cited
US2339096A
Cited
US2753939A
Cited
US2836659A
Cited
US2927078A
Cited
US3051653A
Cited
US3096777A
Cited
US3076757A
Cited
US3172473A
Cited
US3276519A
Cited
US3241614A
Cited
US3279541A
Cited
US3357487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |