US2715038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum handling apparatus
Assignee: VACUUM CONCRETE Inc
•
Filing: 1954-05-28
•
Granted: 1955-08-09
•
Expires: 1974-05-28
Abstract
No abstract record available.
Inventors
- 👤 Karl P Billner
- 👤 Jacob J Creskoff
- 👤 Harold A Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:42
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/02; B66C1/0237; B66C1/0243; B66C1/0281
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE307930C
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US750667A
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US1047954A
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US1068563A
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US2475073A
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US2390242A
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US2651538A
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US2578220A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-08 | 1959-02-07 | 1959-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-08 | 1963-02-07 | 1963-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-08 | 1967-02-07 | 1967-08-09 | $7700.00 | Window Closed / Lapsed |