US3296208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydantoin products and processes for the preparation thereof
Assignee: EIDP Inc
•
Filing: 1963-02-08
•
Granted: 1967-01-03
•
Expires: 1983-02-08
Abstract
No abstract record available.
Inventors
- 👤 Arthur O Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:27
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0605; C08G73/0616; C08G12/00; C08G12/02; C08G12/26; Y; Y10; Y10S; Y10S260/00; Y10S260/34
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
10 words
A LINEAR CONDENSATION POLYMER COMPRISING RECURRING UNITS OF THE STRUCTURE
Claim 2
Dependent Claim
10 words
A LINEAR CONDENSATION POLYMER COMPRISING RECURRING UNITS OF THE STRUCTURE
Claim 3
Dependent Claim
36 words
THE PROCESS OF PRODUCING A LINEAR CONDENSATION POLYMER WHICH COMPRISES REACTING FORMALDEHYDE AT A TEMPERATURE FROM ABOUT 50*C. TO ABOUT 90*C AND IN THE PRESENCE OF A BASIC CATALYST, WHICH A BISHYDANTOIN COMPOUND OF THE FORMULA
Claim 4
Dependent Claim
36 words
THE PROCESS OF PRODUCING A LINEAR CONDENSATION POLYMER WHICH COMPRISES REACTING FORMALDEHYDE AT A TEMPERATURE FROM ABOUT 50*C. TO ABOUT 90*C AND IN THE PRESENCE OF A BASIC CATALYST, WHICH A BISHYDANTOIN COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2417999A
Cited
US2418000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |