US2989794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shuttering system for cast concrete walls
Assignee: Individual
•
Filing: 1956-06-20
•
Granted: 1961-06-27
•
Expires: 1976-06-20
Abstract
No abstract record available.
Inventors
- 👤 Bittner Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:59
CPC Classifications
E; E04; E04G; E04G17/00; E04G17/06; E04G17/07; E04G17/0707; E04G17/0714
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US676785A
Cited
US1038986A
Cited
US1036468A
Cited
US1114946A
Cited
US1101592A
Cited
US1574636A
Cited
US1588229A
Cited
US1619144A
Cited
US1780661A
Cited
US1658681A
Cited
US1697354A
Cited
US1823195A
Cited
US1935218A
Cited
US2019195A
Cited
US2118374A
Cited
US2127973A
Cited
US2352783A
Cited
US2312983A
Cited
US2329550A
Cited
US2442292A
Cited
US2574274A
Cited
US2493264A
Cited
US2657449A
Cited
US2806277A
Cited
US2669000A
Cited
US2873505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |