Patent US2889591A successfully refreshed from Google Patents.
US2889591A
Expired / Lapsed
US
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Window structure
Assignee: Individual
•
Filing: 1953-11-19
•
Granted: 1959-06-09
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Expires: 1973-11-19
Abstract
No abstract record available.
Inventors
- 👤 Raymond C Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:40
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/32; E06B3/34; E06B3/40; E06B9/00; E06B9/24; E06B9/26; E06B9/264
Claims Analysis
Total Claims: 0
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US2632927A
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US2631339A
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US2731681A
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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) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |