Patent US2710728A successfully refreshed from Google Patents.
US2710728A
Expired / Lapsed
US
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Pneumatic conveyor systems
Assignee: Individual
•
Filing: 1950-06-29
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Granted: 1955-06-14
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Expires: 1970-06-29
Abstract
No abstract record available.
Inventors
- 👤 Halpern Johannes Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:00
CPC Classifications
B; B65; B65G; B65G51/00; B65G51/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US44107A
Cited
US141294A
Cited
US398836A
Cited
US489931A
Cited
US1797651A
Cited
DE488593C
Cited
US2150440A
Cited
DE696124C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-13 | 1958-12-13 | 1959-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-13 | 1962-12-13 | 1963-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-13 | 1966-12-13 | 1967-06-14 | $7700.00 | Window Closed / Lapsed |