US1670844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Base powder for waterproofing, etc., and process of producing the same
Assignee: ASPHALT PRODUCTS CO Inc
•
Filing: 1921-02-19
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Granted: 1928-05-22
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Expires: 1941-02-19
Abstract
No abstract record available.
Inventors
- 👤 Ralph R Cone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:00
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/18
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) | 1931-05-22 | 1931-11-21 | 1932-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-05-22 | 1935-11-21 | 1936-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-05-22 | 1939-11-21 | 1940-05-22 | $7700.00 | Window Closed / Lapsed |