Patent US2729640A successfully refreshed from Google Patents.
US2729640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxy-iso-melamine
Assignee: Wyeth Holdings LLC
•
Filing: 1955-05-09
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Granted: 1956-01-03
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Expires: 1975-05-09
Abstract
No abstract record available.
Inventors
- 👤 Donald W Kaiser
- 👤 John J Roemer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:40
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/26; C11D3/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
HYDROXY-ISO-MELAMINE HAVING THE FORMULA:
Claim 2
Dependent Claim
4 words
HYDROXY-ISO-MELAMINE HAVING THE FORMULA:
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) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |