Patent US2473018A successfully refreshed from Google Patents.
US2473018A
Expired / Lapsed
US
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Building structure
Assignee: BURKE H CRITCHFIELD
•
Filing: 1947-07-25
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Granted: 1949-06-14
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Expires: 1967-07-25
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:16
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/56; E04B2/70; E04B2/701; E04B2/702
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1708162A
Cited
US1567595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |