US3189653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mono hydrazinium hydroxypolyalkoxy-alkylalkylene-diamines
Assignee: WR Grace and Co
•
Filing: 1962-08-20
•
Granted: 1965-06-15
•
Expires: 1982-08-20
Abstract
No abstract record available.
Inventors
- 👤 Rudner Bernard
- 👤 Aristotle G Prapas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:48
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/19; Y10S260/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
COMPOSITION HAVING A MOLECULAR WEIGHT UP TO ABOUT 27,000 AND THE GENERAL FORMULA:
Claim 2
Dependent Claim
13 words
COMPOSITION HAVING A MOLECULAR WEIGHT UP TO ABOUT 27,000 AND THE GENERAL FORMULA:
References Cited (Backward Citations)
US2674619A
Cited
US2955108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |