US1951017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating chemical pulf
Assignee: Weyerhaeuser Timber Co
•
Filing: 1933-07-20
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Granted: 1934-03-13
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Expires: 1953-07-20
Abstract
No abstract record available.
Inventors
- 👤 Raymond S Hatch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:39
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/02; D21D5/04; B; B01; B01D; B01D29/00; B01D29/01; B01D29/50; B01D29/52; B01D29/62; B01D29/64; B01D29/6438; B01D29/76; B01D29/78; B01D29/88; B01D29/94; B01D29/945
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) | 1937-03-12 | 1937-09-11 | 1938-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-03-12 | 1941-09-11 | 1942-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-03-12 | 1945-09-11 | 1946-03-13 | $7700.00 | Window Closed / Lapsed |