US2172533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material amd process of using the
Assignee: —
•
Filing: —
•
Granted: 1939-09-12
•
Expires: 1956-09-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:26
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/08; C10; C10M; C10M173/00; C10M173/02; C10M2201/00; C10M2201/02; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2211/00; C10M2211/04; C10M2211/042; C10M2211/06; C10M2215/00; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2219/00; C10M2219/04; C10M2219/044; C10N; C10N2040/00; C10N2040/20; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247; C10N2050/00; C10N2050/01
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) | 1942-09-11 | 1943-03-13 | 1943-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-09-11 | 1947-03-13 | 1947-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-09-11 | 1951-03-13 | 1951-09-12 | $7700.00 | Window Closed / Lapsed |