US2824083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions containing bf3 complexes and their use as curing agents for polyepoxides
Assignee: Shell Development Co
•
Filing: 1955-12-27
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Granted: 1958-02-18
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Expires: 1975-12-27
Abstract
No abstract record available.
Inventors
- 👤 Harvey L Parry
- 👤 William A Hubbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:31
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/72; C08G59/40; C08G59/62; C08L; C08L63/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A PROCESS FOR RESINIFYING POLYEPOXIDES WHICH COMPRISES MIXING AND REACTING A POLYEPOXIDE HAVING A
Claim 2
Dependent Claim
14 words
A PROCESS FOR RESINIFYING POLYEPOXIDES WHICH COMPRISES MIXING AND REACTING A POLYEPOXIDE HAVING A
References Cited (Backward Citations)
US2717885A
Cited
US2728744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |