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Patent US1833904A successfully refreshed from Google Patents.
US1833904A
Expired / Lapsed
US
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Vacuum cleaner bag
Assignee: Individual
•
Filing: 1930-04-28
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Granted: 1931-12-01
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Expires: 1950-04-28
Abstract
No abstract record available.
Inventors
- 👤 Addie T Keys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:49
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/20; Y; Y10; Y10S; Y10S55/00; Y10S55/26; Y10T; Y10T24/00; Y10T24/44; Y10T24/44256; Y10T24/44291; Y10T24/44376; Y10T24/44385; Y10T24/44427; Y10T24/44436
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) | 1934-11-30 | 1935-06-01 | 1935-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-11-30 | 1939-06-01 | 1939-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-11-30 | 1943-06-01 | 1943-12-01 | $7700.00 | Window Closed / Lapsed |