US2089149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic concrete induction apparatus for tunnel forms
Assignee: Chain Belt Co
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Filing: 1934-08-17
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Granted: 1937-08-03
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Expires: 1954-08-17
Abstract
No abstract record available.
Inventors
- 👤 Charles I Longenecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:00
CPC Classifications
E; E21; E21D; E21D11/00; E21D11/04; E21D11/10; E21D11/105; E04; E04G; E04G21/00; E04G21/02; E04G21/04; E04G21/0418; E04G21/0472
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) | 1940-08-02 | 1941-02-01 | 1941-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-08-02 | 1945-02-01 | 1945-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-08-02 | 1949-02-01 | 1949-08-03 | $7700.00 | Window Closed / Lapsed |