US2083575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of modifying cellulose pulp for paper making purposes
Assignee: RAYBESTONS MANHATTAN Inc
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Filing: 1933-09-01
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Granted: 1937-06-15
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Expires: 1953-09-01
Abstract
No abstract record available.
Inventors
- 👤 Ixador J Novak
- 👤 Albert L Clapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:27
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/001; D21C9/002; D21C9/004
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) | 1940-06-14 | 1940-12-14 | 1941-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-06-14 | 1944-12-14 | 1945-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-06-14 | 1948-12-14 | 1949-06-15 | $7700.00 | Window Closed / Lapsed |