US3390500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screed support
Assignee: Individual
•
Filing: 1966-06-13
•
Granted: 1968-07-02
•
Expires: 1986-06-13
Abstract
No abstract record available.
Inventors
- 👤 Karl J Schumak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:27
CPC Classifications
E; E04; E04F; E04F21/00; E04F21/02; E04F21/04; E04F21/05; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/965
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1664370A
Cited
US2224273A
Cited
US2676680A
Cited
US2910155A
Cited
GB863488A
Cited
US2940299A
Cited
US3157966A
Cited
US3333380A
Cited
US3284973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |