US2420879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent thermal insulation
Assignee: Individual
•
Filing: 1942-12-01
•
Granted: 1947-05-20
•
Expires: 1962-12-01
Abstract
No abstract record available.
Inventors
- 👤 Charles H Herter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:23
CPC Classifications
A; A47; A47F; A47F3/00; A47F3/04; A47F3/0482; A47F3/0486; A47F3/0404; A47F3/0426; A47F3/0434
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US94016A
Cited
US532043A
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US1570811A
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US1744070A
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US1788905A
Cited
US1924117A
Cited
US1988964A
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US2046362A
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US2267542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |