Patent US2969296A successfully refreshed from Google Patents.
US2129441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building
Assignee: Individual
•
Filing: 1936-01-08
•
Granted: 1938-09-06
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Expires: 1956-01-08
Abstract
No abstract record available.
Inventors
- 👤 Karl F Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:01
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/02; E04B1/10
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) | 1941-09-05 | 1942-03-07 | 1942-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-09-05 | 1946-03-07 | 1946-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-09-05 | 1950-03-07 | 1950-09-06 | $7700.00 | Window Closed / Lapsed |