Patent US2548935A successfully refreshed from Google Patents.
US2548935A
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US
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Method of molding joints between spaced structural members
Assignee: VACUUM CONCRETE Inc
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Filing: 1947-09-05
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Granted: 1951-04-17
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Expires: 1967-09-05
Abstract
No abstract record available.
Inventors
- 👤 Karl P Billner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:57
CPC Classifications
E; E04; E04G; E04G17/00; E04G17/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US882196A
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US958419A
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US1500121A
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US1630801A
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US2046867A
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US2317997A
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US2239989A
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US2474721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |