Patent US2641449A successfully refreshed from Google Patents.
US2641449A
Expired / Lapsed
US
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Building construction
Assignee: Individual
•
Filing: 1947-11-14
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Granted: 1953-06-09
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Expires: 1967-11-14
Abstract
No abstract record available.
Inventors
- 👤 John C Antony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:16
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/02; E04B1/08; E04B1/62; E04B1/74; F; F24; F24D; F24D5/00; F24D5/06; F24D5/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1974767A
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US2104500A
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US2184113A
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US2211384A
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US2182686A
Cited
US2249257A
Cited
US2326549A
Cited
US2379636A
Cited
US2392240A
Cited
US2440763A
Cited
US2584591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |