US2929803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastic copolyureas from secondary diamines and process for making the same
Assignee: EIDP Inc
•
Filing: 1955-01-31
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Granted: 1960-03-22
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Expires: 1975-01-31
Abstract
No abstract record available.
Inventors
- 👤 Frazer August Henry
- 👤 Jr Joseph Clois Shivers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:48
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4825; C08G18/08; C08G18/10; C08L; C08L75/00; Y; Y10; Y10S; Y10S528/00; Y10S528/904; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A FILAMENT-FORMING LINEAR SEGMENTED POLYMER CONSISTING ESSENTIALLY OF A MULTIPLICITY OF UREA SEGMENTS CONTAINING AT LEAST ONE REPEATING UNIT OF A FIBER-FORMING POLYUREA, SAID REPEATING UNIT BEING OF THE FORMULA
Claim 2
Dependent Claim
30 words
A FILAMENT-FORMING LINEAR SEGMENTED POLYMER CONSISTING ESSENTIALLY OF A MULTIPLICITY OF UREA SEGMENTS CONTAINING AT LEAST ONE REPEATING UNIT OF A FIBER-FORMING POLYUREA, SAID REPEATING UNIT BEING OF THE FORMULA
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) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |