US2969299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of handling thin-sheet material to prevent distortion
Assignee: Teledyne Ryan Aeronautical Corp
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Filing: 1958-07-21
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Granted: 1961-01-24
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Expires: 1978-07-21
Abstract
No abstract record available.
Inventors
- 👤 John R Fullerton
- 👤 Lawrence E Leech
- 👤 Donald L Heyser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:10
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74; C21D1/773; Y; Y10; Y10T; Y10T29/00; Y10T29/30; Y10T29/301; Y10T29/303; Y10T29/305; Y10T29/49; Y10T29/49998
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A METHOD OF HANDLING THIN MATERIAL HAVING INHERENT GRAIN GROWTH CHANGES DURING LOW TEMPERATURE HEAT TREATMENT TO PREVENT DISTORTION OF THE MATERIAL, COMPRISING: PLACING THE MATERIAL BETWEEN TWO RIGID, PLATE ELEMENTS HAVING CONFRONTING SURFACES SHAPTED TO CONFORM TO THE CORRESPONDING SURFACES OF THE MATERIAL, ENCLOSING THE RESULTANT SANDWICH OF MATERIAL AND THICK PLATES IN A SEALED, FLEXIBLE, NON-POROUS BAG, EVACUATING THE AIR FROM THE INTERIOR OF THE BAG CAUSING SAID MATERIAL TO BE CLAMPED FLAT BETWEEN SAID THICK PLATES BY EXTERNAL PRESSURE AND PREVENTING CONTAMINATION AND SURFACE FINISH DAMAGE TO THE MATERIAL, AND MAINTAINING THE VACUUM WHILE THE TEMPERATURE IS LOWERED FOR THE PERIOD OF TIME REQUIRED FOR TREATMENT.
Claim 2
Independent Claim
109 words
A METHOD OF HANDLING THIN MATERIAL HAVING INHERENT GRAIN GROWTH CHANGES DURING LOW TEMPERATURE HEAT TREATMENT TO PREVENT DISTORTION OF THE MATERIAL, COMPRISING: PLACING THE MATERIAL BETWEEN TWO RIGID, PLATE ELEMENTS HAVING CONFRONTING SURFACES SHAPTED TO CONFORM TO THE CORRESPONDING SURFACES OF THE MATERIAL, ENCLOSING THE RESULTANT SANDWICH OF MATERIAL AND THICK PLATES IN A SEALED, FLEXIBLE, NON-POROUS BAG, EVACUATING THE AIR FROM THE INTERIOR OF THE BAG CAUSING SAID MATERIAL TO BE CLAMPED FLAT BETWEEN SAID THICK PLATES BY EXTERNAL PRESSURE AND PREVENTING CONTAMINATION AND SURFACE FINISH DAMAGE TO THE MATERIAL, AND MAINTAINING THE VACUUM WHILE THE TEMPERATURE IS LOWERED FOR THE PERIOD OF TIME REQUIRED FOR TREATMENT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |