US3248429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphorus polymers
Assignee: Hooker Chemical Corp
•
Filing: 1962-12-03
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Granted: 1966-04-26
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Expires: 1982-12-03
Abstract
No abstract record available.
Inventors
- 👤 Charles F Baranauckas
- 👤 Gordon Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:29
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C08G79/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A PROCESS FOR PREPARING POLY-A-HYDROXY ORGANO PHOSPHORUS ETHER WHICH COMPRISES: HEATING AN ORGANIC PHOSPHORUS COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS COMPOUNDS OF FORMULAE
Claim 2
Dependent Claim
25 words
A PROCESS FOR PREPARING POLY-A-HYDROXY ORGANO PHOSPHORUS ETHER WHICH COMPRISES: HEATING AN ORGANIC PHOSPHORUS COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS COMPOUNDS OF FORMULAE
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |