US2540331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulation
Assignee: Individual
•
Filing: 1945-06-18
•
Granted: 1951-02-06
•
Expires: 1965-06-18
Abstract
No abstract record available.
Inventors
- 👤 Rudolf F Hlavaty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:26
CPC Classifications
B; B64; B64C; B64C1/00; B64C1/40; F; F25; F25D; F25D23/00; F25D23/06; F25D23/065; F25D23/068; Y; Y10; Y10S; Y10S62/00; Y10S62/05; Y10S62/13
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |