Patent US2229121A successfully refreshed from Google Patents.
US2229121A
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Method and apparatus for operating on sheet material
Assignee: EDWIN J MCILVRIED
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Filing: 1938-04-27
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Granted: 1941-01-21
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Expires: 1958-04-27
Abstract
No abstract record available.
Inventors
- 👤 Norman H Nye
- 👤 Ralph L Penn
- 👤 Ralph W Penn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:07
CPC Classifications
B; B31; B31B; B31B70/00; B31B50/00; B31B50/005; B31B2155/00; B31B2160/00; B31B2160/10; B31B70/02; B31B70/022; B31B70/024; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1054; Y10T156/12; Y10T156/1313
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) | 1944-01-21 | 1944-07-22 | 1945-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-21 | 1948-07-22 | 1949-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-21 | 1952-07-22 | 1953-01-21 | $7700.00 | Window Closed / Lapsed |