Patent NL39850C successfully refreshed from Google Patents.
Patent US3229649A successfully refreshed from Google Patents.
US3229649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air raid shelter
Assignee: Rolls Royce Composite Materials Ltd
•
Filing: 1962-10-10
•
Granted: 1966-01-18
•
Expires: 1982-10-10
Abstract
No abstract record available.
Inventors
- 👤 Baker William Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:31
CPC Classifications
E; E04; E04H; E04H9/00; E04H9/04; E04H9/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
153 words
AN AIRCRAFT AIR RAID SHELTER COMPRISING A DOME-SHAPED SHELL COMPRISING SPACED SKINS OF RESIN-BONDED FIBROUS MATERIAL AND WEBS BRIDGING THE SPACE BETWEEN THE SKINS, A SEPARATELY FORMED BASE ON WHICH THE SHELL RESTS, A HORIZONTAL HINGE JOINT PIVOTING THE SHELL TO THE BASE AT THE PERIPHERY OF THE SHELL, AND TWO JACKS CONNECTED TO THE BASE AND CONNECTED TO THE SHELL AT POINTS LYING CLOSE TO THE PERIPHERY OF THE SHELL ON OPPOSITE SIDES OF A PERPENDICULAR BISECTOR OF THE HINGE JOINT, THE SAID JACKS BEING SITUATED CLOSE TO THE PERIPHERY OF THE SHELL AT POINTS LYING BETWEEN THE HINGE JOINT AND A DIAMETRAL LINE OF THE SHELL PARALLEL TO THE HINGE AXIS FOR SWINGING THE SHELL UPWARDS BY THEIR OWN POWER TO A HEIGHT SUFFICIENT TO ALLOW AN AIRCRAFT AT THE CENTRE OF THE SHELL TO BE WITHDRAWN FROM THE SHELL ALONG VARIOUS PATHS LYING WITHIN A RANGE OF AT LEAST 180*.
References Cited (Backward Citations)
US1709701A
Cited
US2112348A
Cited
US2397184A
Cited
US2773459A
Cited
US2897668A
Cited
US2830606A
Cited
US2837101A
Cited
US2792794A
Cited
GB866229A
Cited
US2990837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |