US2518148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide polymers and process for preparing same
Assignee: Armour and Co
•
Filing: 1944-12-29
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Granted: 1950-08-08
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Expires: 1964-12-29
Abstract
No abstract record available.
Inventors
- 👤 Wesley A Jordan
- 👤 Sydney H Shapiro
- 👤 Julius M Schrager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:10
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/34; C08F; C08F36/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FRO THE PRODUCTIN OF A POLYAMIDE POLYMER, COMPRISING HEATING TO A REACTION TEMPERATURE ABOUT ONE MOLE OF A DIAMINE SELECTED FROM THE GROUP CONSISTING OF ETHYLENE DIAMINE, PROPYLENE DIAMINE, TETRAMETHYLENE DIAMINE, AND PENTAMETHYLENE DIAMINE, WITH ABOUT TWO MOLES OF A POLYENE MONOBASIC FATTY ACID OF FROM 8 TO 26 CARBON ATOMS TO PRODUCE A POLYAMIDE, AND MAINTAINING THE POLYAMIDE AT A TEMPERATURE OF FROM 250* TO 350*C. FOR A PERIOD OF ABOUT 4 TO 6 HOURS TO POLYMERIZE THE SAME.
Claim 2
Dependent Claim
82 words
A PROCESS FRO THE PRODUCTIN OF A POLYAMIDE POLYMER, COMPRISING HEATING TO A REACTION TEMPERATURE ABOUT ONE MOLE OF A DIAMINE SELECTED FROM THE GROUP CONSISTING OF ETHYLENE DIAMINE, PROPYLENE DIAMINE, TETRAMETHYLENE DIAMINE, AND PENTAMETHYLENE DIAMINE, WITH ABOUT TWO MOLES OF A POLYENE MONOBASIC FATTY ACID OF FROM 8 TO 26 CARBON ATOMS TO PRODUCE A POLYAMIDE, AND MAINTAINING THE POLYAMIDE AT A TEMPERATURE OF FROM 250* TO 350*C. FOR A PERIOD OF ABOUT 4 TO 6 HOURS TO POLYMERIZE THE SAME.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |