Patent US3370405A successfully refreshed from Google Patents.
US3370405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner filter bags and method of manufacturing same
Assignee: Studley Paper Co Inc
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Filing: 1964-12-18
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Granted: 1968-02-27
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Expires: 1984-12-18
Abstract
No abstract record available.
Inventors
- 👤 John J Fesco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:46
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/14; Y; Y10; Y10S; Y10S55/00; Y10S55/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A DISPOSABLE VACUUM CLEANER FILTER BAG HAVING A FRONT WALL, A REAR WALL, OPPOSING END WALLS BETWEEN SAID FRONT AND REAR WALLS, AND UPPER AND LOWER END CLOSURES, AND AN INTERMEDIATE WALL DISPOSED BETWEEN SAID FRONT AND REAR WALLS AND COEXTENSIVE THEREWITH, SAID INTERMEDIATE WALL HAVING AN AIR-FLOW APERTURE DEFINED THEREIN, AND SAID FRONT WALL HAVING AN AIR INLET APERTURE DEFINED THEREIN, SAID FRONT WALL, SAID REAR WALL AND SAID INTERMEDIATE WALLS HAVING COMMON END CLOSURES.
Claim 2
Dependent Claim
76 words
A DISPOSABLE VACUUM CLEANER FILTER BAG HAVING A FRONT WALL, A REAR WALL, OPPOSING END WALLS BETWEEN SAID FRONT AND REAR WALLS, AND UPPER AND LOWER END CLOSURES, AND AN INTERMEDIATE WALL DISPOSED BETWEEN SAID FRONT AND REAR WALLS AND COEXTENSIVE THEREWITH, SAID INTERMEDIATE WALL HAVING AN AIR-FLOW APERTURE DEFINED THEREIN, AND SAID FRONT WALL HAVING AN AIR INLET APERTURE DEFINED THEREIN, SAID FRONT WALL, SAID REAR WALL AND SAID INTERMEDIATE WALLS HAVING COMMON END CLOSURES.
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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) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |