Patent US3452979A successfully refreshed from Google Patents.
US2017441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Securing members for self-supporting structural building units
Assignee: FER O CON CORP
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Filing: 1933-11-17
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Granted: 1935-10-15
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Expires: 1953-11-17
Abstract
No abstract record available.
Inventors
- 👤 Guy F Kotrbaty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:01
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/74; E04B2/76; E04B2/78; E04B2/7854; E04B2/7872; E04B1/00; E04B1/02; E04B1/14
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) | 1938-10-14 | 1939-04-15 | 1939-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-10-14 | 1943-04-15 | 1943-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-10-14 | 1947-04-15 | 1947-10-15 | $7700.00 | Window Closed / Lapsed |