US2806016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyglycidyl ethers of tetraphenols
Assignee: Shell Development Co
•
Filing: 1954-11-01
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Granted: 1957-09-10
•
Expires: 1974-11-01
Abstract
No abstract record available.
Inventors
- 👤 Carl G Schwarzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:35
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/24; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/32; C08G59/3218
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A POLYGLYCIDYL ETHER OF AN ALPHA,ALPHA, OMEGA,OMEGA-TETRAKIS(HYDROXYARYL) ALKANE WHEREIN THE ALKANE CHAIN CONTAINS AT LEAST 2 CARBON ATOMS.
Claim 2
Dependent Claim
18 words
A POLYGLYCIDYL ETHER OF AN ALPHA,ALPHA, OMEGA,OMEGA-TETRAKIS(HYDROXYARYL) ALKANE WHEREIN THE ALKANE CHAIN CONTAINS AT LEAST 2 CARBON ATOMS.
References Cited (Backward Citations)
US2333548A
Cited
US2592560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |