US2637878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined door and window
Assignee: Individual
•
Filing: 1949-07-28
•
Granted: 1953-05-12
•
Expires: 1969-07-28
Abstract
No abstract record available.
Inventors
- 👤 William C Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:22
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/32; E06B3/34; E06B3/42; E06B3/46; E06B3/4609; E06B3/4618; E05; E05D; E05D15/00; E05D15/06; E05D15/0621; E05D15/066; E05D15/0691; E05Y; E05Y2201/00; E05Y2201/40; E05Y2201/47; E05Y2201/474
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR743146A
Cited
US1569602A
Cited
US1929977A
Cited
US1930379A
Cited
US2144782A
Cited
US2177462A
Cited
US2363121A
Cited
US3076377A
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 |