Patent US1700904A successfully refreshed from Google Patents.
US1700904A
Expired / Lapsed
US
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Folding stair structure
Assignee: PAUL G MARSCHKE
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Filing: 1927-02-21
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Granted: 1929-02-05
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Expires: 1947-02-21
Abstract
No abstract record available.
Inventors
- 👤 Reinhold B Marschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:06
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/02; E04F11/04; E04F11/06; E04F11/062; E04F11/064
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) | 1932-02-05 | 1932-08-06 | 1933-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-02-05 | 1936-08-06 | 1937-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-02-05 | 1940-08-06 | 1941-02-05 | $7700.00 | Window Closed / Lapsed |