US3477764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-propelling cushioning conveyor
Assignee: LEON W SMITH
•
Filing: 1968-04-15
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Granted: 1969-11-11
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Expires: 1988-04-15
Abstract
No abstract record available.
Inventors
- 👤 Leon W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:02
CPC Classifications
B; B60; B60V; B60V3/00; B60V3/02; B60V3/04; B65; B65G; B65G51/00; B65G51/02; B65G51/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1515965A
Cited
FR1056003A
Cited
GB797371A
Cited
US3099493A
Cited
US3232673A
Cited
US3181916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |