US3036108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylene amino phosphonic acid chelating agents
Assignee: Dow Chemical Co
•
Filing: 1958-12-02
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Granted: 1962-05-22
•
Expires: 1978-12-02
Abstract
No abstract record available.
Inventors
- 👤 Albert E Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:49
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808; C07F9/40; C07F9/4003; C07F9/4006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
CHEMICAL COMPOUND HAVING A STRUCTURE GIVEN BY THE FOLLOWING:
Claim 2
Dependent Claim
9 words
CHEMICAL COMPOUND HAVING A STRUCTURE GIVEN BY THE FOLLOWING:
References Cited (Backward Citations)
US2268157A
Cited
US2328358A
Cited
US2635112A
Cited
US2586656A
Cited
US2841606A
Cited
US2870190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |