US3337476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystalline poly(propylene glycol)
Assignee: Hercules LLC
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Filing: 1964-03-02
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Granted: 1967-08-22
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Expires: 1984-03-02
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Vandenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:10
CPC Classifications
C; C08; C08L; C08L77/00; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/13; C07C43/135; C07C43/137; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/4009; C08G18/4081; C08G18/48; C08G18/4804; C08G18/4825; C08G18/4833; C08G18/4837; C08G18/4854; C08G18/4866; C08G18/487; C08G18/4875; C08G18/4879; C08G18/52; C08G18/64; C08G18/6415; C08G18/6423; C08G18/67; C08G18/6795; C08G59/00; C08G59/18; C08G59/40; C08G59/66; C08G63/00; C08G63/66; C08G65/00; C08G65/02; C08G65/32; C08G69/00; C08G69/40; C08G73/00; C08G73/02; C08G73/0206; C08G75/00; C08G75/02; C08L63/00; C08L81/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
AS A NEW COMPOSITION OF MATTER, A CRYSTALLINE POLY(PROPYLENE GLYCOL) HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF FROM ABOUT 1,000 TO ABOUT 20,000 AND EXHIBITING HIGH CRYSTALLINITY AS SHOWN BY DIFFERENTIAL THERMAL ANALYSIS.
Claim 2
Dependent Claim
33 words
AS A NEW COMPOSITION OF MATTER, A CRYSTALLINE POLY(PROPYLENE GLYCOL) HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF FROM ABOUT 1,000 TO ABOUT 20,000 AND EXHIBITING HIGH CRYSTALLINITY AS SHOWN BY DIFFERENTIAL THERMAL ANALYSIS.
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) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |