Patent US1994073A successfully refreshed from Google Patents.
US1994073A
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US
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Composition for impregnating wood and other cellulosic materials
Assignee: PROTEXOL Corp
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Filing: 1930-07-12
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Granted: 1935-03-12
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Expires: 1950-07-12
Abstract
No abstract record available.
Inventors
- 👤 Ernest F Hartman
- 👤 Willet F Whitmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:14
CPC Classifications
A; A01; A01N; A01N59/00; A01N59/14; A01N59/16; B; B27; B27K; B27K3/00; B27K3/16; B27K3/32
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) | 1938-03-11 | 1938-09-10 | 1939-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-03-11 | 1942-09-10 | 1943-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-03-11 | 1946-09-10 | 1947-03-12 | $7700.00 | Window Closed / Lapsed |