Patent US2221960A successfully refreshed from Google Patents.
US2221960A
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US
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Process for removing wallpaper
Assignee: National Oil Products Co
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Filing: 1938-02-10
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Granted: 1940-11-19
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Expires: 1958-02-10
Abstract
No abstract record available.
Inventors
- 👤 William L Abramowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:35
CPC Classifications
B; B44; B44C; B44C7/00; B44C7/02; B44C7/027; C; C09; C09D; C09D9/00; D; D21; D21C; D21C5/00; D21C5/02; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/64; Y10; Y10S; Y10S156/00; Y10S156/918; Y10S156/929; Y10T; Y10T156/00; Y10T156/11; Y10T156/1168; Y10T156/19; Y10T156/1961; Y10T156/1967; Y10T156/1972
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) | 1943-11-19 | 1944-05-20 | 1944-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-19 | 1948-05-20 | 1948-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-19 | 1952-05-20 | 1952-11-19 | $7700.00 | Window Closed / Lapsed |