Patent US1553592A successfully refreshed from Google Patents.
US1553592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the production of hollow blocks made from plastic materials
Assignee: Individual
•
Filing: 1921-03-23
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Granted: 1925-09-15
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Expires: 1941-03-23
Abstract
No abstract record available.
Inventors
- 👤 Otto L Borner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:48
CPC Classifications
B; B28; B28B; B28B11/00; B28B11/14; B28B11/16; B28B3/00; B28B3/20; B28B3/26; B28B3/2627
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) | 1928-09-14 | 1929-03-16 | 1929-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-09-14 | 1933-03-16 | 1933-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-09-14 | 1937-03-16 | 1937-09-15 | $7700.00 | Window Closed / Lapsed |