Patent US1753775A successfully refreshed from Google Patents.
US1753775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sizing paper pulp
Assignee: PROCESS ENGINEERS Inc
•
Filing: 1929-05-24
•
Granted: 1930-04-08
•
Expires: 1949-05-24
Abstract
No abstract record available.
Inventors
- 👤 Cew Judson A De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:02
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/63; D21H17/66; D21H23/00; D21H23/02; D21H23/04; D21H23/06; D21H23/08; D21H23/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1933-04-07 | 1933-10-07 | 1934-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-04-07 | 1937-10-07 | 1938-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-04-07 | 1941-10-07 | 1942-04-08 | $7700.00 | Window Closed / Lapsed |