Patent US3794357A successfully refreshed from Google Patents.
Patent US2571883A successfully refreshed from Google Patents.
US2571883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-methylene-1, 3-propylene dichloride homopolymer
Assignee: Hercules Powder Co
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Filing: 1948-10-28
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Granted: 1951-10-16
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Expires: 1968-10-28
Abstract
No abstract record available.
Inventors
- 👤 George E Hulse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:22
CPC Classifications
C; C08; C08F; C08F114/00; C08F114/02; C08F114/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A HOMOPOLYMER OF 2-METHYLENE-1,3-PROPYLENE DICHLORIDE.
Claim 2
Dependent Claim
5 words
A HOMOPOLYMER OF 2-METHYLENE-1,3-PROPYLENE DICHLORIDE.
References Cited (Backward Citations)
US2042222A
Cited
US2498084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-15 | 1955-04-16 | 1955-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-15 | 1959-04-16 | 1959-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-15 | 1963-04-16 | 1963-10-16 | $7700.00 | Window Closed / Lapsed |