US2721601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming printing roller cores
Assignee: Perma-Flex Ind Ltd
•
Filing: 1952-02-14
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Granted: 1955-10-25
•
Expires: 1972-02-14
Abstract
No abstract record available.
Inventors
- 👤 Spencer James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:27
CPC Classifications
B; B41; B41N; B41N7/00; B41N7/005; B29; B29C; B29C63/00; B29C63/18; B29C63/20; B41N2207/00; B41N2207/02; B41N2207/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49544; Y10T29/4956; Y10T29/49563; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49885
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1608206A
Cited
US2090014A
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US2006364A
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US2312853A
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US2333800A
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US2329796A
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US2641301A
Cited
US2518834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |