Patent US3479802A successfully refreshed from Google Patents.
US3479802A
Expired / Lapsed
US
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Multi-compartment vacuum cleaner filter bag
Assignee: Studley Paper Co Inc
•
Filing: 1965-02-23
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Granted: 1969-11-25
•
Expires: 1985-02-23
Abstract
No abstract record available.
Inventors
- 👤 John J Fesco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:54
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/14; Y; Y10; Y10S; Y10S493/00; Y10S493/916; Y10S493/933; Y10S55/00; Y10S55/02; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1074
Claims Analysis
Total Claims: 0
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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) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |