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Patent US2847724A successfully refreshed from Google Patents.
US2847724A
Expired / Lapsed
US
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Window construction
Assignee: Individual
•
Filing: 1953-01-21
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Granted: 1958-08-19
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Expires: 1973-01-21
Abstract
No abstract record available.
Inventors
- 👤 Harold A Blood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:59
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/04; E06B3/26; E06B3/2605; E06B2003/2615
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2278666A
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US2395673A
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US2559764A
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US2651084A
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US2612662A
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US2578470A
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US2640232A
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US2667245A
Cited
DE847652C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |