US2780935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a floor slab
Assignee: Individual
•
Filing: 1952-11-26
•
Granted: 1957-02-12
•
Expires: 1972-11-26
Abstract
No abstract record available.
Inventors
- 👤 Roy W Rumble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:10
CPC Classifications
E; E04; E04G; E04G13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US625258A
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US844295A
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US845046A
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US1684663A
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US1887132A
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US2109009A
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US2230430A
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US2272382A
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US2372200A
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US2453466A
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US2648101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-12 | 1960-08-13 | 1961-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-12 | 1964-08-13 | 1965-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-12 | 1968-08-13 | 1969-02-12 | $7700.00 | Window Closed / Lapsed |