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Patent US2022267A successfully refreshed from Google Patents.
US2022267A
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Protective device for casinghead drips
Assignee: MAGNOLIA PETROLEUM Co
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Filing: 1933-08-31
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Granted: 1935-11-26
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Expires: 1953-08-31
Abstract
No abstract record available.
Inventors
- 👤 Orf B Zeek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:49
CPC Classifications
E; E21; E21B; E21B43/00; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/554; Y10T70/5544; Y10T70/5549; Y10T70/5553; Y10T70/5562; Y10T70/5575; Y10T70/558; Y10T70/5584; Y10T70/5593; Y10T70/5597; Y10T70/5602
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-11-25 | 1939-05-27 | 1939-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-11-25 | 1943-05-27 | 1943-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-11-25 | 1947-05-27 | 1947-11-26 | $7700.00 | Window Closed / Lapsed |