US2938699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prop-type supporting devices
Assignee: Individual
•
Filing: 1954-01-04
•
Granted: 1960-05-31
•
Expires: 1974-01-04
Abstract
No abstract record available.
Inventors
- 👤 Bellmann Emma Elfriede
- 👤 Kronsbein Ruth
- 👤 Bellmann Friedhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:17
CPC Classifications
E; E21; E21D; E21D15/00; E21D15/58; E21D15/585; E21D15/586; E21D15/588; E21D15/14; E21D15/28; E21D15/30; E21D15/306
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR958578A
Cited
US2160454A
Cited
US2364715A
Cited
US2379989A
Cited
DE864538C
Cited
DE813541C
Cited
DE811106C
Cited
DE831834C
Cited
BE507997A
Cited
US2676571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |