US3619989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner bag
Assignee: Mil-An Mfg Corp
•
Filing: 1969-04-03
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Granted: 1971-11-16
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Expires: 1989-04-03
Abstract
Abstract A MULTI-COMPARTMENT VACUUM CLEANER BAG FORMED OF AN AIR PERMEABLE MATERIAL COMPRISING FIRST BAG TUBE MEMBER AND A SECOND BAG TUBE MEMBER, SAID BAG TUBE MEMBERS BEING INTERCONNECTED, SAID FIRST BAG TUBE MEMBER BEING ADAPTED TO BE CONNECTED TO A VACUUM CLEANER, THE INTERIOR OF SAID FIRST BAG TUBE MEMBER BEING IN AIRFLOWING RELATION WITH THE INTERIOR OF SAID SECOND BAG TUBE MEMBER, SAID SECOND BAG TUBE MEMBER BEING BEING OPENABLE AT ONE END THEROF.
Inventors
- 👤 Sol Howard
- 👤 Robert Schaaf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:59
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/14; Y; Y10; Y10S; Y10S55/00; Y10S55/03
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |