US2045733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulation structure
Assignee: Wood Conversion Co
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Filing: 1931-10-16
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Granted: 1936-06-30
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Expires: 1951-10-16
Abstract
No abstract record available.
Inventors
- 👤 Allen L Spafford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:28
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/32; E04C2/322; Y; Y10; Y10S; Y10S220/00; Y10S220/09; Y10S428/00; Y10S428/906; Y10S428/92; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24446; Y10T428/24455; Y10T428/24628; Y10T428/24653; Y10T428/24669; Y10T428/24694; Y10T428/24711; Y10T428/24727; Y10T428/24777
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) | 1939-06-30 | 1939-12-30 | 1940-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-06-30 | 1943-12-30 | 1944-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-06-30 | 1947-12-30 | 1948-06-30 | $7700.00 | Window Closed / Lapsed |