Patent US3109824A successfully refreshed from Google Patents.
US3109824A
Expired / Lapsed
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Method of dissolving polyurethanes and polyureas using tall oil
Assignee: Bayer Corp
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Filing: 1960-11-14
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Granted: 1963-11-05
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Expires: 1980-11-14
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Heiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:14
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/10; C08J11/18; C08J11/22; C08J11/26; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/831; C08J2375/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
50 words
THE METHOD OF AT LEAST PARTIALLY LIQUEFYING A MEMBER SELECTED FROM THE GROUP CONSISTING OF SOLID POLYRETHANES AND SOLID POLYREAS WHICH COMPRISES HEATING SAID MEMBER IN A LIQUID CARBOXYLIC ACID HAVING A MOLECULAR WEIGHT BELOW ABOUT 5000 AND AN ACID NUMBER GREATER THAN ABOUT 25 UNTIL SAID MEMBER IS LIQUID.
Claim 2
Independent Claim
50 words
THE METHOD OF AT LEAST PARTIALLY LIQUEFYING A MEMBER SELECTED FROM THE GROUP CONSISTING OF SOLID POLYRETHANES AND SOLID POLYREAS WHICH COMPRISES HEATING SAID MEMBER IN A LIQUID CARBOXYLIC ACID HAVING A MOLECULAR WEIGHT BELOW ABOUT 5000 AND AN ACID NUMBER GREATER THAN ABOUT 25 UNTIL SAID MEMBER IS LIQUID.
Claim 3
Dependent Claim
12 words
THE METHOD OF CLAIM 1 WHEREIN SAID CARBOXYLIC ACID IS TALL OIL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |