Patent US2676481A successfully refreshed from Google Patents.
US2676481A
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Building structure
Assignee: MARTIN HOFFMAN Co
•
Filing: 1949-08-25
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Granted: 1954-04-27
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Expires: 1969-08-25
Abstract
No abstract record available.
Inventors
- 👤 Hoffman Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:31
CPC Classifications
E; E04; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/0801; E04F13/0803; E04F13/0832; E04F13/0833; E04F13/0846; E04F13/0848; Y; Y10; Y10S; Y10S277/00; Y10S277/921
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |