US2962097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for carrying out a removable flow tube program
Assignee: Otis Engineering Corp
•
Filing: 1958-04-21
•
Granted: 1960-11-29
•
Expires: 1978-04-21
Abstract
No abstract record available.
Inventors
- 👤 William W Dollison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:21
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1540195A
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US2500276A
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US2605131A
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US2901045A
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US2777523A
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US2799346A
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US2856008A
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US2810442A
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US2806538A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |