US2446413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for bending hard grainless fiber sheets
Assignee: COOLERATOR Co
•
Filing: 1942-12-02
•
Granted: 1948-08-03
•
Expires: 1962-12-02
Abstract
No abstract record available.
Inventors
- 👤 Per H Esbjornson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:54
CPC Classifications
B; B27; B27D; B27D1/00; B27D1/04; B27D1/08; B27D1/083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-03 | 1952-02-02 | 1952-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-03 | 1956-02-02 | 1956-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-03 | 1960-02-02 | 1960-08-03 | $7700.00 | Window Closed / Lapsed |