Patent US2998070A successfully refreshed from Google Patents.
US2998070A
Expired / Lapsed
US
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Tamper proof manifold
Assignee: Otis Engineering Corp
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Filing: 1958-11-17
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Granted: 1961-08-29
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Expires: 1978-11-17
Abstract
No abstract record available.
Inventors
- 👤 Jack W Tamplen
- 👤 Phillip S Sizer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:22
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/10; E21B34/16; E21B2200/00; E21B2200/04
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) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |