Patent US1239770A successfully refreshed from Google Patents.
US1239770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-insulating wall.
Assignee: Isko Inc
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Filing: 1917-03-22
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Granted: 1917-09-11
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Expires: 1937-03-22
Abstract
No abstract record available.
Inventors
- 👤 Clyde J Coleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:23
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/7654; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/231; Y10T428/24; Y10T428/24744
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) | 1920-09-10 | 1921-03-12 | 1921-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-09-10 | 1925-03-12 | 1925-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-09-10 | 1929-03-12 | 1929-09-11 | $7700.00 | Window Closed / Lapsed |