US2888436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyfunctional polymeric products
Assignee: Phillips Petroleum Co
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Filing: 1955-02-18
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Granted: 1959-05-26
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Expires: 1975-02-18
Abstract
No abstract record available.
Inventors
- 👤 James E Pritchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:54
CPC Classifications
C; C08; C08C; C08C19/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
29 words
AS A NEW COMPOSITION OF MATTER, THE REACTION PRODDUT OF MIXTURE OF FORMALDEHYDE AND A POLYMER OF A METHYL SUBSTITUTED HETEROCYCLIC NITROGEN BASE SELECTED FROM THE GROUP CONSISTING OF
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) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |