Patent US2531249A successfully refreshed from Google Patents.
US2531249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Buff construction
Assignee: Divine Brothers Co
•
Filing: 1948-09-29
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Granted: 1950-11-21
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Expires: 1968-09-29
Abstract
No abstract record available.
Inventors
- 👤 James D Blair
- 👤 George A Hendey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:49
CPC Classifications
B; B24; B24D; B24D13/00; B24D13/20; B24D13/02; B24D13/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE19894E
Cited
US2004623A
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US2140208A
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US2106610A
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US2226925A
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US2291524A
Cited
US2290236A
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US2260941A
Cited
US2350216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |