Patent US2638190A successfully refreshed from Google Patents.
US2638190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined door and window
Assignee: Individual
•
Filing: 1950-05-15
•
Granted: 1953-05-12
•
Expires: 1970-05-15
Abstract
No abstract record available.
Inventors
- 👤 William C Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:47
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/32; E06B3/34; E06B3/42; E06B3/46; E06B3/4609; E06B3/4618
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1303113A
Cited
CH133127A
Cited
US1789970A
Cited
GB367739A
Cited
US2072300A
Cited
US2367129A
Cited
US2541675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |