Patent US2658810A successfully refreshed from Google Patents.
US2658810A
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Work unit
Assignee: EIDP Inc
•
Filing: 1948-04-09
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Granted: 1953-11-10
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Expires: 1968-04-09
Abstract
No abstract record available.
Inventors
- 👤 Ellis Howard
- 👤 Albert K Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:49
CPC Classifications
E; E04; E04H; E04H1/00; E04H1/005; A; A47; A47B; A47B83/00; A47B83/001; A47B96/00; A47B96/04; E04B; E04B2/00; E04B2/74; E04B2/7407; E04B2/7416; E04B2/7433; E04B2/7435; E04H1/06; A47B2200/00; A47B2200/01; E04B2002/7483; E04B2002/7487; E04B2002/749
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US419295A
Cited
US797826A
Cited
US959230A
Cited
US1357062A
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US1420942A
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US1392418A
Cited
US1441331A
Cited
US1648891A
Cited
US1455569A
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US1647889A
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US1649805A
Cited
US1764229A
Cited
US1729268A
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US1914646A
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US1915046A
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US2210721A
Cited
US2439027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |