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Patent US1940974A successfully refreshed from Google Patents.
US1940974A
Expired / Lapsed
US
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Waterproof and water-repellant insulation
Assignee: THERMINSUL Corp OF AMERICA
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Filing: 1931-01-07
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Granted: 1933-12-26
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Expires: 1951-01-07
Abstract
No abstract record available.
Inventors
- 👤 George D Shaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:14
CPC Classifications
C; C04; C04B; C04B26/00; C04B26/02; C04B26/26; C04B2111/00; C04B2111/20; C04B2111/27
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) | 1936-12-25 | 1937-06-26 | 1937-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-12-25 | 1941-06-26 | 1941-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-12-25 | 1945-06-26 | 1945-12-26 | $7700.00 | Window Closed / Lapsed |