US3131889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balloon structure with release mechanism
Assignee: Raven Industries Inc
•
Filing: 1961-10-16
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Granted: 1964-05-05
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Expires: 1981-10-16
Abstract
No abstract record available.
Inventors
- 👤 Paul E Yost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:45
CPC Classifications
B; B64; B64B; B64B1/00; B64B1/40
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
A MANNED FLIGHT BALLOON STRUCTURE COMPRISING A BALLOON INFLATABLE WITH A LIFTING GAS AND HAVING AN OPENING AT THE LOWER END, LOAD LINES ARRANGED AROUND THE OPENING AND EXTENDING DOWNWARDLY TO TWO LATERALLY SPACED SUSPENSION POINTS, A RIGID GAS FLOW CONDUIT EXTENDING RIGIDLY BETWEEN SAID POINTS SECURED AT ITS ENDS TO THE LINES AT SAID POINTS AND MAINTAINING SAID POINTS SPACED, A BURNER FOR PRODUCING LIFTING GAS CENTRALLY LOCATED BELOW SAID OPENING AND SUPPORTED ON SAID CONDUIT, VERTICALLY DOWNWARDLY EXTENDING SEAT LINES CONNECTED TO SAID POINTS, AND A SEAT SUSPENDED BETWEEN SAID SEAT LINES BELOW BURNER.
References Cited (Backward Citations)
US330705A
Cited
US953591A
Cited
DE344591C
Cited
US1563571A
Cited
US1553340A
Cited
US2756948A
Cited
US2728540A
Cited
US2858090A
Cited
US2823876A
Cited
US2864569A
Cited
US2993663A
Cited
US2839123A
Cited
US2996112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |