US3220671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar balloon or aerostat
Assignee: Arthur D Little Inc
•
Filing: 1963-10-28
•
Granted: 1965-11-30
•
Expires: 1983-10-28
Abstract
No abstract record available.
Inventors
- 👤 Leland E Ashman
- 👤 Robert M Jolkovski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:52
CPC Classifications
B; B64; B64B; B64B1/00; B64B1/58; B64B1/62
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3128969A
Cited
US1866079A
Cited
US2268320A
Cited
US2506755A
Cited
US2998005A
Cited
US3110457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |