US2280460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for use in insulating structures
Assignee: Johns Manville Corp
•
Filing: 1940-04-03
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Granted: 1942-04-21
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Expires: 1960-04-03
Abstract
No abstract record available.
Inventors
- 👤 Paul A Voigt
- 👤 Johan E Johansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:45
CPC Classifications
B; B44; B44C; B44C7/00; B44C7/02; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T156/1317; Y10T156/1343; Y10T156/17; Y10T156/1798
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) | 1945-04-20 | 1945-10-20 | 1946-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-04-20 | 1949-10-20 | 1950-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-04-20 | 1953-10-20 | 1954-04-21 | $7700.00 | Window Closed / Lapsed |