Patent US3044948A successfully refreshed from Google Patents.
Patent US1801685A successfully refreshed from Google Patents.
US1801685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gypsum mixer
Assignee: Individual
•
Filing: 1929-07-15
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Granted: 1931-04-21
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Expires: 1949-07-15
Abstract
No abstract record available.
Inventors
- 👤 Olson Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:16
CPC Classifications
B; B28; B28C; B28C5/00; B28C5/08; B28C5/10; B28C5/12; B28C5/16; B28C5/161; B01; B01F; B01F27/00; B01F27/80; B01F27/84
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) | 1934-04-20 | 1934-10-20 | 1935-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-04-20 | 1938-10-20 | 1939-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-04-20 | 1942-10-20 | 1943-04-21 | $7700.00 | Window Closed / Lapsed |