Patent US3301606A successfully refreshed from Google Patents.
US3301606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclonic elevator
Assignee: Individual
•
Filing: 1966-06-23
•
Granted: 1967-01-31
•
Expires: 1986-06-23
Abstract
No abstract record available.
Inventors
- 👤 Anthony I Bruno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:35
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/90; E02F3/92
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
AN AIR LIFT DEVICE COMPRISING IN COMBINATION: (A) A TUBE FOR LIFTING MATERIAL, (B) AT LEAST ONE CHAMBER SURROUNDING THE TUBE ADJACENT ONE END THEREOF, (C) A PLURALITY OF PASSAGES LEADING FROM THE CHAMBER TO THE INTERIOR OF THE TUBE AND ARRANGED ABOUT THE TUBE IN A SPIRAL PATTERN, AND (D) MEANS FOR SUPPLYING COMPRESSED AIR TO SAID CHAMBER AND THROUGH SAID PASSAGES TO SAID TUBE TO IMPART
Claim 2
Dependent Claim
68 words
AN AIR LIFT DEVICE COMPRISING IN COMBINATION: (A) A TUBE FOR LIFTING MATERIAL, (B) AT LEAST ONE CHAMBER SURROUNDING THE TUBE ADJACENT ONE END THEREOF, (C) A PLURALITY OF PASSAGES LEADING FROM THE CHAMBER TO THE INTERIOR OF THE TUBE AND ARRANGED ABOUT THE TUBE IN A SPIRAL PATTERN, AND (D) MEANS FOR SUPPLYING COMPRESSED AIR TO SAID CHAMBER AND THROUGH SAID PASSAGES TO SAID TUBE TO IMPART
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |