Patent US2816489A successfully refreshed from Google Patents.
US2816489A
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Assignee: DENCO MACHINE PRODUCTS
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Filing: 1955-04-15
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Granted: 1957-12-17
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Expires: 1975-04-15
Abstract
No abstract record available.
Inventors
- 👤 Lloyd W Robbins
- 👤 Alonzo P Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:58
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/50; B23Q1/52; B23Q1/525; Y; Y10; Y10S; Y10S269/00; Y10S269/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US577226A
Cited
US1323059A
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US1033758A
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US1376077A
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US1551995A
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US2645026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |