Patent US3214394A successfully refreshed from Google Patents.
US3214394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane foam having a phosphonous acid chemically combined therein
Assignee: Hooker Chemical Corp
•
Filing: 1963-07-17
•
Granted: 1965-10-26
•
Expires: 1983-07-17
Abstract
No abstract record available.
Inventors
- 👤 Blaine O Schoepfle
- 👤 Raymond R Hindersinn
- 👤 Worsley Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:14
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3878; C08G18/388
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A POLYURETHANE FOAM HAVING A PHOSPHONOUS ACID CHEMICALLY COMBINED THEREIN.
Claim 2
Dependent Claim
10 words
A POLYURETHANE FOAM HAVING A PHOSPHONOUS ACID CHEMICALLY COMBINED THEREIN.
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |