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Patent US3028815A successfully refreshed from Google Patents.
US3028815A
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Automatic intermitting device
Assignee: Otis Engineering Corp
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Filing: 1957-08-12
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Granted: 1962-04-10
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Expires: 1977-08-12
Abstract
No abstract record available.
Inventors
- 👤 Carlos R Canalizo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:22
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86413
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US862867A
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US1828206A
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US2042300A
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US2251323A
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US2501294A
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US2245005A
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US2328841A
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US2904011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |