Patent US1989048A successfully refreshed from Google Patents.
US1989048A
Expired / Lapsed
US
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Method and apparatus for reducing the bulk of stacks of paper sheets and softening said sheets
Assignee: UNITED STATES PAPER MILLS Inc
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Filing: 1934-05-25
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Granted: 1935-01-22
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Expires: 1954-05-25
Abstract
No abstract record available.
Inventors
- 👤 Courtney P Winter
- 👤 Dunbar A Rosenthal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:13
CPC Classifications
B; B65; B65H; B65H29/00; B65H29/12; B65H2301/00; B65H2301/40; B65H2301/42; B65H2301/422; B65H2301/4223; B65H2404/00; B65H2404/20; B65H2404/26; B65H2404/261; B65H2701/00; B65H2701/10; B65H2701/19; B65H2701/1924
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) | 1938-01-21 | 1938-07-23 | 1939-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-01-21 | 1942-07-23 | 1943-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-01-21 | 1946-07-23 | 1947-01-22 | $7700.00 | Window Closed / Lapsed |