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US2868296A
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Dual screen assembly
Assignee: Jersey Production Research Co
•
Filing: 1956-02-14
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Granted: 1959-01-13
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Expires: 1976-02-14
Abstract
No abstract record available.
Inventors
- 👤 John B Payne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:36
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/08; E21B43/086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2107655A
Cited
US2368428A
Cited
US2433942A
Cited
US2766831A
Cited
US2702598A
Cited
US2717041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |