Patent US2444842A successfully refreshed from Google Patents.
US2444842A
Expired / Lapsed
US
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Polish rod hanger
Assignee: JM Huber Corp
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Filing: 1947-04-10
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Granted: 1948-07-06
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Expires: 1967-04-10
Abstract
No abstract record available.
Inventors
- 👤 Mcconahey Theodore De Witte
- 👤 Redell Fredrick Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:17
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; E21B43/121; E21B43/126; E21B43/127; Y; Y10; Y10T; Y10T24/00; Y10T24/39; Y10T24/3907; Y10T24/3909; Y10T24/44; Y10T24/44573; Y10T24/44607; Y10T403/00; Y10T403/71; Y10T403/7129; Y10T403/7135; Y10T74/00; Y10T74/18; Y10T74/18048
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-06 | 1952-01-05 | 1952-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-06 | 1956-01-05 | 1956-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-06 | 1960-01-05 | 1960-07-06 | $7700.00 | Window Closed / Lapsed |