Patent US2854843A successfully refreshed from Google Patents.
US2854843A
Expired / Lapsed
US
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Plaster ground
Assignee: Individual
•
Filing: 1955-12-13
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Granted: 1958-10-07
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Expires: 1975-12-13
Abstract
No abstract record available.
Inventors
- 👤 Herbert H Lamb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:05
CPC Classifications
E; E04; E04F; E04F21/00; E04F21/02; E04F21/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1697300A
Cited
US1791822A
Cited
GB550078A
Cited
US2502166A
Cited
US2616145A
Cited
US2725608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |