US2957856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphorus-containing spirobi(metadioxane) resins
Assignee: Union Carbide Corp
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Filing: 1958-08-29
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Granted: 1960-10-25
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Expires: 1978-08-29
Abstract
No abstract record available.
Inventors
- 👤 Howard R Guest
- 👤 Ben W Kiff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:34
CPC Classifications
C; C08; C08G; C08G4/00; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/053; C08K5/15; C08K5/156; C08K5/1575; C08K5/49; C08K5/51; C08K5/52; C08K5/527
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A CURABLE COMPOSITION COMPRISING 3,9-DIALKENYLSPIROBI(META-DIOXANE) HAVING BETWEEN TWO AND EIGHTEEN CARBON ATOMS IN EACH ALKENYL RADICAL, ALIPHATIC POLYHYDRIC ALCOHOL, AND BETWEEN ABOUT 5 WEIGHT PERCENT AND 30 WEIGHT PERCENT, BASED ON THE TOTAL COMPOSITION WEIGHT, OF PENTAERYTHRITOL PHOSPHITE MATERIAL OF THE CLASS PRODUCED BY HYDROLYSIS OF THE REACTION PRODUCT DERIVED FROM THE CONDENSATION OF PENTAERYTHRITOL WITH PHOSPHOROUS TRICHLORIDE.
Claim 2
Dependent Claim
58 words
A CURABLE COMPOSITION COMPRISING 3,9-DIALKENYLSPIROBI(META-DIOXANE) HAVING BETWEEN TWO AND EIGHTEEN CARBON ATOMS IN EACH ALKENYL RADICAL, ALIPHATIC POLYHYDRIC ALCOHOL, AND BETWEEN ABOUT 5 WEIGHT PERCENT AND 30 WEIGHT PERCENT, BASED ON THE TOTAL COMPOSITION WEIGHT, OF PENTAERYTHRITOL PHOSPHITE MATERIAL OF THE CLASS PRODUCED BY HYDROLYSIS OF THE REACTION PRODUCT DERIVED FROM THE CONDENSATION OF PENTAERYTHRITOL WITH PHOSPHOROUS TRICHLORIDE.
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) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |