Patent US2329496A successfully refreshed from Google Patents.
Patent US2721139A successfully refreshed from Google Patents.
US2721139A
Expired / Lapsed
US
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Paper manufacture
Assignee: Hurlbut Paper Co
•
Filing: 1952-08-27
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Granted: 1955-10-18
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Expires: 1972-08-27
Abstract
No abstract record available.
Inventors
- 👤 Hanns F Arledter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:58
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H13/00; D21H13/36; D21H13/38; D21H13/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2459803A
Cited
US2526125A
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US2414833A
Cited
US2504744A
Cited
US2477000A
Cited
US2626213A
Cited
US2658848A
Cited
US2706156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |