US3350857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner filter bag
Assignee: Studley Paper Co Inc
•
Filing: 1964-06-26
•
Granted: 1967-11-07
•
Expires: 1984-06-26
Abstract
No abstract record available.
Inventors
- 👤 John J Fesco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:20
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A VACUUM CLEANER FILTER BAG COMPRISING AN ELONGATED TUBULAR MEMBER FORMED OF FILTER SHEET MATERIAL, THE OPPOSITE ENDS OF SAID MEMBER BEING SECURED TOGETHER TO FORM SAID TUBULAR MEMBER INTO SUBSTANTIALLY ELLIPTICAL CONFORMATION, SAID TUBULAR MEMBER BEING FOLDED UPON ITSELF AT SAID ENDS AND SAID END FOLDS BEING SECURED TOGETHER TO DEFINE AN AIR-IMPERMEABLE SEAL, AND AN AIR INLET APERATURE DEFINED IN SAID TUBULAR MEMBER, SAID MUTUALLY SECURED ENDS BEING DISPOSED ADJACENT TO SAID MUTUALLY AND A HANGER ELEMENT PROVIDED ON SAID MEMBER, SAID HANGER ELEMENT BEING DISPOSED REMOTELY FROM SAID MUTUALLY SECURED ENDS.
Claim 2
Dependent Claim
94 words
A VACUUM CLEANER FILTER BAG COMPRISING AN ELONGATED TUBULAR MEMBER FORMED OF FILTER SHEET MATERIAL, THE OPPOSITE ENDS OF SAID MEMBER BEING SECURED TOGETHER TO FORM SAID TUBULAR MEMBER INTO SUBSTANTIALLY ELLIPTICAL CONFORMATION, SAID TUBULAR MEMBER BEING FOLDED UPON ITSELF AT SAID ENDS AND SAID END FOLDS BEING SECURED TOGETHER TO DEFINE AN AIR-IMPERMEABLE SEAL, AND AN AIR INLET APERATURE DEFINED IN SAID TUBULAR MEMBER, SAID MUTUALLY SECURED ENDS BEING DISPOSED ADJACENT TO SAID MUTUALLY AND A HANGER ELEMENT PROVIDED ON SAID MEMBER, SAID HANGER ELEMENT BEING DISPOSED REMOTELY FROM SAID MUTUALLY SECURED ENDS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |