US2440921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grouting device
Assignee: Individual
•
Filing: 1946-02-20
•
Granted: 1948-05-04
•
Expires: 1966-02-20
Abstract
No abstract record available.
Inventors
- 👤 Robert S Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:36
CPC Classifications
E; E01; E01B; E01B27/00; E01B27/12; E01B27/13; E01B27/16; E01B27/18; E02; E02D; E02D3/00; E02D3/12; E01B2203/00; E01B2203/04; E01B2203/047; E01B2204/00; E01B2204/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1106679A
Cited
US1295166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-04 | 1951-11-03 | 1952-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-04 | 1955-11-03 | 1956-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-04 | 1959-11-03 | 1960-05-04 | $7700.00 | Window Closed / Lapsed |