US3000044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door check
Assignee: Individual
•
Filing: 1958-06-30
•
Granted: 1961-09-19
•
Expires: 1978-06-30
Abstract
No abstract record available.
Inventors
- 👤 Edwin L Allen
- 👤 Robert S Heron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:37
CPC Classifications
E; E05; E05C; E05C17/00; E05C17/02; E05C17/04; E05C17/08; E05C17/085; E05C17/30; Y; Y10; Y10T; Y10T292/00; Y10T292/28; Y10T292/305
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1196087A
Cited
US1462235A
Cited
US1942860A
Cited
US2196779A
Cited
US2221123A
Cited
US2229513A
Cited
US2880029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |