Patent US3686764A successfully refreshed from Google Patents.
Patent US2284898A successfully refreshed from Google Patents.
US2284898A
Expired / Lapsed
US
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Structural system
Assignee: Individual
•
Filing: 1939-11-29
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Granted: 1942-06-02
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Expires: 1959-11-29
Abstract
No abstract record available.
Inventors
- 👤 Rudolph B Hartman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:41
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/04; E04C3/11; E04B; E04B1/00; E04B1/18; E04B1/19; E04C3/08; E04C3/09; E04B2001/1924; E04B2001/1933; E04B2001/1936; E04B2001/1945; E04B2001/1951; E04B2001/1954; E04B2001/1957; E04B2001/1963; E04B2001/1975; E04B2001/1981; E04B2001/1984; E04B2001/199; E04B2001/1993; E04C2003/0486; E04C2003/0491
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-06-01 | 1945-12-01 | 1946-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-06-01 | 1949-12-01 | 1950-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-06-01 | 1953-12-01 | 1954-06-02 | $7700.00 | Window Closed / Lapsed |