Patent US3044993A successfully refreshed from Google Patents.
US3044993A
Expired / Lapsed
US
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Manufacture of linear polycondensation products
Assignee: Akzona Inc
•
Filing: 1958-09-22
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Granted: 1962-07-17
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Expires: 1978-09-22
Abstract
No abstract record available.
Inventors
- 👤 Tiemersma Heine Gerke Nicolai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:42
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/04; B; B01; B01J; B01J19/00; B01J19/24; C08G63/00; C08G63/78; C08G63/785; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094; B01J2219/00121; B01J2219/0013; B01J2219/00162
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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DE623448C
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US2545006A
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FR1023648A
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US2719776A
Cited
US2749212A
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US2731081A
Cited
US2810630A
Cited
GB797743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-16 | 1966-01-15 | 1966-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-16 | 1970-01-15 | 1970-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-16 | 1974-01-15 | 1974-07-17 | $7700.00 | Window Closed / Lapsed |