Patent US2885738A successfully refreshed from Google Patents.
US2885738A
Expired / Lapsed
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Methods of absorbing and retaining expanding media in plastic materials
Assignee: AT&T Inc
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Filing: 1955-12-29
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Granted: 1959-05-12
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Expires: 1975-12-29
Abstract
No abstract record available.
Inventors
- 👤 George E Henning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:10
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/461; B29C44/3442; C; C08; C08J; C08J9/00; C08J9/16; C08J9/18; H; H01; H01B; H01B13/00; H01B13/06; H01B13/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
95 words
THE METHOD OF MAKING CESSULAR PRODUCTS, WHICH COMPRISES INTRODUCING GRANULES OF A THERMOPLASTIC RESIN INTO A CONTAINER, SUPPLYING A LIQUEFIED, NORMALLY GASEOUS EXPANDING MEDIUM TO BE ABSORBED IN THE GRANULES TO THE CONTAINER, ELEVATING THE TEMPERATURE OF THE GRANULES TO INCREASE THE RATE OF ABSORPTION OF THE LIQUEFIED EXPANDING MEDIUM THEREIN, SUBSEQUENTLY COOLING THE GRANULES TREATED WITH THE EXPANDING MEDIUM TO A TEMPERATURE AT WHICH THE VAPOR PRESSURE OF THE EXPANDING MEDIUM IS SUBSTANTIALLY ZEOR AND THE EXPANDING MEDIUM WILL BE RETAINED IN THE GRANULES, INTRODUCING THE TREATED GRANULES INTO AN EXTRUSIO CYLINDER, ADVANCING THE
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) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |