Patent US1608690A successfully refreshed from Google Patents.
US1608690A
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Process of and apparatus for forming cellular building blocks
Assignee: INSULEX Corp
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Filing: 1924-08-07
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Granted: 1926-11-30
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Expires: 1944-08-07
Abstract
No abstract record available.
Inventors
- 👤 Harold S Ashenhurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:37
CPC Classifications
B; B28; B28B; B28B11/00; B28B11/14; B28B11/145; B28B1/00; B28B1/50; B28B17/00; B28B5/00; B28B5/04; Y; Y10; Y10S; Y10S264/00; Y10S264/63; Y10S425/00; Y10S425/20; Y10S425/201
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) | 1929-11-29 | 1930-05-31 | 1930-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-11-29 | 1934-05-31 | 1934-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-11-29 | 1938-05-31 | 1938-11-30 | $7700.00 | Window Closed / Lapsed |