US3044540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Canopy-door unit
Assignee: EVADNA B HAMMERSLEY
•
Filing: 1960-04-25
•
Granted: 1962-07-17
•
Expires: 1980-04-25
Abstract
No abstract record available.
Inventors
- 👤 Lowell V Hammersley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:30
CPC Classifications
E; E06; E06B; E06B5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US467423A
Cited
US1832246A
Cited
GB453604A
Cited
US2072092A
Cited
US2814999A
Cited
US2863181A
Cited
US2941794A
Cited
US2973561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-16 | 1966-01-15 | 1966-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-16 | 1970-01-15 | 1970-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-16 | 1974-01-15 | 1974-07-17 | $7700.00 | Window Closed / Lapsed |