US2898994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making paper pulp
Assignee: Individual
•
Filing: 1953-03-31
•
Granted: 1959-08-11
•
Expires: 1973-03-31
Abstract
No abstract record available.
Inventors
- 👤 Alfred M Thomsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:03
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US272375A
Cited
CA480404A
Cited
US1605926A
Cited
US726036A
Cited
US731290A
Cited
US1229422A
Cited
US1374435A
Cited
US1830461A
Cited
US1560900A
Cited
US1573169A
Cited
US1699808A
Cited
US1860848A
Cited
US1792202A
Cited
US1902106A
Cited
US1867593A
Cited
US1823519A
Cited
US1944281A
Cited
US1974751A
Cited
US2031239A
Cited
US2054727A
Cited
US2528350A
Cited
US2701763A
Cited
US2694631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |