US3541818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Key
Assignee: Individual
•
Filing: 1968-07-05
•
Granted: 1970-11-24
•
Expires: 1988-07-05
Abstract
No abstract record available.
Inventors
- 👤 Eugene Dana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:27
CPC Classifications
E; E05; E05B; E05B15/00; E05B15/16; E05B15/1635; E05B19/00; E05B19/26; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/778; Y10T70/7791; Y10T70/7842; Y10T70/7859; Y10T70/7864; Y10T70/7876
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US878739A
Cited
US2571692A
Cited
US2714304A
Cited
US2809144A
Cited
US2951780A
Cited
US2932963A
Cited
GB934838A
Cited
US3413186A
Cited
US3313135A
Cited
US3335049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-23 | 1974-05-25 | 1974-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-23 | 1978-05-25 | 1978-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-23 | 1982-05-25 | 1982-11-24 | $7700.00 | Window Closed / Lapsed |