US3380783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conduit for pneumatically conveying plastic particulate material
Assignee: Black Sivalls and Bryson Inc
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Filing: 1966-11-16
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Granted: 1968-04-30
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Expires: 1986-11-16
Abstract
No abstract record available.
Inventors
- 👤 Jack C Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:59
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/52; B65G53/521; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/20; B21C37/207; B21D; B21D15/00; B21D15/04; B29; B29C; B29C31/00; B29C31/002; B29C59/00; B29C59/02; B29C59/021; B29C67/00; B29C67/0014
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |