US2520972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat insulating cover
Assignee: Individual
•
Filing: 1945-05-22
•
Granted: 1950-09-05
•
Expires: 1965-05-22
Abstract
No abstract record available.
Inventors
- 👤 Paul A Siple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:43
CPC Classifications
E; E05; E05G; E05G1/00; E05G1/02; E05G1/024; A; A47; A47B; A47B67/00; A47B67/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US66790A
Cited
US79808A
Cited
US86356A
Cited
GB190318431A
Cited
US1350363A
Cited
US1843619A
Cited
US2022251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |