US2106938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fireproofing of wood
Assignee: Ruhrchemie AG
•
Filing: 1935-06-21
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Granted: 1938-02-01
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Expires: 1955-06-21
Abstract
No abstract record available.
Inventors
- 👤 Tramm Heinrich
- 👤 Clar Carl
- 👤 Kuhnel Paul
- 👤 Schuff Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:52
CPC Classifications
C; C09; C09K; C09K21/00; C09K21/14
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) | 1941-01-31 | 1941-08-02 | 1942-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-01-31 | 1945-08-02 | 1946-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-01-31 | 1949-08-02 | 1950-02-01 | $7700.00 | Window Closed / Lapsed |