US2087679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cleaning and preparing conduits for the handling of plastic concrete mixtures
Assignee: Chain Belt Co
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Filing: 1933-11-24
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Granted: 1937-07-20
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Expires: 1953-11-24
Abstract
No abstract record available.
Inventors
- 👤 Charles F Ball
- 👤 Charles I Longeneeker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:27
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/02; E04G21/04; Y; Y10; Y10S; Y10S417/00; Y10S417/90; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0402; Y10T137/4238; Y10T137/4245; Y10T137/4259
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) | 1940-07-19 | 1941-01-18 | 1941-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-07-19 | 1945-01-18 | 1945-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-07-19 | 1949-01-18 | 1949-07-20 | $7700.00 | Window Closed / Lapsed |