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Patent US3457889A successfully refreshed from Google Patents.
US3457889A
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US
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Assignee: Singer Co
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Filing: 1967-09-20
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Granted: 1969-07-29
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Expires: 1987-09-20
Abstract
No abstract record available.
Inventors
- 👤 Karl H Killinger
- 👤 Edward J Tullman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:12
CPC Classifications
D; D05; D05B; D05B29/00; D05B29/12
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) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |