US3054632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door holding device
Assignee: Individual
•
Filing: 1959-07-20
•
Granted: 1962-09-18
•
Expires: 1979-07-20
Abstract
No abstract record available.
Inventors
- 👤 Robert B Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:56
CPC Classifications
E; E05; E05C; E05C17/00; E05C17/02; E05C17/54; Y; Y10; Y10S; Y10S292/00; Y10S292/15; Y10T; Y10T292/00; Y10T292/34; Y10T292/71; Y10T292/73
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US504571A
Cited
US652659A
Cited
US971717A
Cited
US1599595A
Cited
US1695872A
Cited
US2120692A
Cited
US2784443A
Cited
US2796280A
Cited
US2872232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-17 | 1966-03-19 | 1966-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-17 | 1970-03-19 | 1970-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-17 | 1974-03-19 | 1974-09-18 | $7700.00 | Window Closed / Lapsed |