Patent US2641988A successfully refreshed from Google Patents.
US2641988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Farm building
Assignee: DOANE AGRICULTURAL SERVICE Inc
•
Filing: 1949-08-01
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Granted: 1953-06-16
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Expires: 1969-08-01
Abstract
No abstract record available.
Inventors
- 👤 Bernon G Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:06
CPC Classifications
E; E04; E04H; E04H5/00; E04H5/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1005983A
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US1043624A
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US1256677A
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CH81175A
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US1431046A
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US1421299A
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US1470298A
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US1673788A
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US2000102A
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US2142692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |