Patent US2755217A successfully refreshed from Google Patents.
US2755217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of manufacturing metal structures
Assignee: Bristol Aeroplane Co Ltd
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Filing: 1953-07-13
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Granted: 1956-07-17
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Expires: 1973-07-13
Abstract
No abstract record available.
Inventors
- 👤 Griffin Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:48
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/1092
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
A METHOD OF ATTACHING STRUCTURAL MEMBERS TO ONE SURFACE OF A SKIN MATERIAL, WHICH METHOD COMPRISES APPLYING THE SKIN MATERIAL TO A FORMER OF THE REQUIRED SHAPE WITH SAID SURFACE EXPOSED, POSITIONING SAID STRUCTURAL MEMBERS ON SAID SURFACE IN RELATION TO SAID SURFACE AS DESIRED, A CURABLE BONDING MEDIUM BEING PREVIOUSLY APPLIED BETWEEN THE STRUCTURAL MEMBERS AND THOSE PARTS OF SAID SURFACE TO BE UNITED THERETO, PRESSING THE STRUCTURAL MEMBERS INTO CONTACT WITH SAID SURFACE UNDER A PREDETERMINED BONDING PRESSURE, RAISING THE TEMPERATURE OF THE SKIN MATERIAL-STRUCTURAL MEMBER ASSEMBLAGE TO A PREDETERMINED LEVEL AND MAINTAINING THE TEMPERATURE OF SAID ASSEMBLAGE AT SAID PREDETERMINED LEVEL FOR A TIME SUFFICIENT TO CURE SAID BONDING MATERAIL AND THEN COOLING THE ASSEMBLAGE, SAID PREDETERMINED BONDING PRESSURE BEING RELIEVED AT INTERVALS DURING AT LEAST THAT PART OF THE BONDING PROCESS IN WHICH THE TEMPERATURE IS BEING RAISED TO SAID PREDETERMINED LEVEL, AND SAID SKIN MATERIAL BEING TENSIONED IN THE PLANE OF THE SKINS AT LEAST IN ONE DIRECTION IN SAID PLANE AND AT LEAST WHEN THE BONDING PRSSURE IS LESS THAN SAID PREDETERMINED BONDING PRESSURE.
Claim 2
Independent Claim
180 words
A METHOD OF ATTACHING STRUCTURAL MEMBERS TO ONE SURFACE OF A SKIN MATERIAL, WHICH METHOD COMPRISES APPLYING THE SKIN MATERIAL TO A FORMER OF THE REQUIRED SHAPE WITH SAID SURFACE EXPOSED, POSITIONING SAID STRUCTURAL MEMBERS ON SAID SURFACE IN RELATION TO SAID SURFACE AS DESIRED, A CURABLE BONDING MEDIUM BEING PREVIOUSLY APPLIED BETWEEN THE STRUCTURAL MEMBERS AND THOSE PARTS OF SAID SURFACE TO BE UNITED THERETO, PRESSING THE STRUCTURAL MEMBERS INTO CONTACT WITH SAID SURFACE UNDER A PREDETERMINED BONDING PRESSURE, RAISING THE TEMPERATURE OF THE SKIN MATERIAL-STRUCTURAL MEMBER ASSEMBLAGE TO A PREDETERMINED LEVEL AND MAINTAINING THE TEMPERATURE OF SAID ASSEMBLAGE AT SAID PREDETERMINED LEVEL FOR A TIME SUFFICIENT TO CURE SAID BONDING MATERAIL AND THEN COOLING THE ASSEMBLAGE, SAID PREDETERMINED BONDING PRESSURE BEING RELIEVED AT INTERVALS DURING AT LEAST THAT PART OF THE BONDING PROCESS IN WHICH THE TEMPERATURE IS BEING RAISED TO SAID PREDETERMINED LEVEL, AND SAID SKIN MATERIAL BEING TENSIONED IN THE PLANE OF THE SKINS AT LEAST IN ONE DIRECTION IN SAID PLANE AND AT LEAST WHEN THE BONDING PRSSURE IS LESS THAN SAID PREDETERMINED BONDING PRESSURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |