Patent US2257429A successfully refreshed from Google Patents.
US2257429A
Expired / Lapsed
US
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Process for producing all-around extensible paper
Assignee: Individual
•
Filing: 1938-08-02
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Granted: 1941-09-30
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Expires: 1958-08-02
Abstract
No abstract record available.
Inventors
- 👤 Ruegenberg Gottfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:25
CPC Classifications
B; B31; B31F; B31F1/00; B31F1/12; B31F1/128; D; D21; D21H; D21H25/00; D21H25/005; D21H5/00; D21H5/24
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) | 1944-09-29 | 1945-03-31 | 1945-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-09-29 | 1949-03-31 | 1949-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-09-29 | 1953-03-31 | 1953-09-30 | $7700.00 | Window Closed / Lapsed |